הִלְכוֹת אִסּוּרֵי בִּיאָה פֵּרֶק כ
א כָּל הַכּוֹהֲנִים שֶׁבַּזְּמָן הַזֶּה--בַּחֲזָקָה הֶם כּוֹהֲנִים, וְאֵינָן אוֹכְלִין אֵלָא בְּקָדְשֵׁי הַגְּבוּל: וְהוּא, שֶׁתִּהְיֶה תְּרוּמָה שֶׁלְּדִבְרֵיהֶם; אֲבָל תְּרוּמָה שֶׁלַּתּוֹרָה, וְחַלָּה שֶׁלַּתּוֹרָה--אֵין אוֹכֵל אוֹתָהּ אֵלָא כּוֹהֵן מְיֻחָס.
ב אֵיזֶה הוּא כּוֹהֵן מְיֻחָס--זֶה שֶׁהֵעִידוּ לוֹ שְׁנֵי עֵדִים שְׁהוּא כּוֹהֵן בֶּן פְּלוֹנִי הַכּוֹהֵן, וּפְלוֹנִי בֶּן פְּלוֹנִי עַד אִישׁ פְּלוֹנִי, וְהוּא, הַכּוֹהֵן שֶׁשִּׁמַּשׁ עַל גַּבֵּי הַמִּזְבֵּחַ: שֶׁאִלּוּ לֹא בָדְקוּ בֵּית דִּין הַגָּדוֹל אַחֲרָיו, לֹא הָיוּ מַנִּיחִין אוֹתוֹ לַעֲבֹד. לְפִיכָּךְ אֵין בּוֹדְקִין מִן הַמִּזְבֵּחַ וּלְמַעְלָה, וְלֹא מִן הַסַּנְהֶדְּרִין וּלְמַעְלָה--שְׁאֵין מְמַנִּין בַּסַּנְהֶדְּרִין אֵלָא כּוֹהֲנִים וּלְוִיִּים וְיִשְׂרְאֵלִיִּים מְיֻחָסִין.
ג חַלָּה בַּזְּמָן הַזֶּה, וְאַפִלּוּ בְּאֶרֶץ יִשְׂרָאֵל--אֵינָהּ שֶׁלַּתּוֹרָה: שֶׁנֶּאֱמָר "בְּבֹאֲכֶם, אֶל-הָאָרֶץ" (במדבר טו,יח)--בִּיאַת כֻּלְּכֶם, וְלֹא בִּיאַת מִקְצַתְכֶם; וּכְשֶׁעָלוּ בִּימֵי עֶזְרָא, לֹא עָלוּ כֻּלָּם. וְכֵן תְּרוּמָה בַּזְּמָן הַזֶּה, שֶׁלְּדִבְרֵי סוֹפְרִים; וּלְפִיכָּךְ אוֹכְלִים אוֹתָהּ הַכּוֹהֲנִים שֶׁבִּזְמַנֵּנוּ, שְׁהֶן בַּחֲזָקָה.
ד מִי שֶׁהֵעִידוּ לוֹ עֵדִים, שֶׁרָאוּהוּ שֶׁהָיָה אוֹכֵל תְּרוּמָה שֶׁלַּתּוֹרָה--הֲרֵי זֶה מְיֻחָס; וְאֵין מַעֲלִין לְיֵחוּסִין לֹא מִנְּשִׂיאוּת כַּפַּיִם, וְלֹא מִקְּרִיאָה בַּתּוֹרָה רִאשׁוֹן, וְלֹא מֵחִלּוּק תְּרוּמָה בְּבֵית הַגְּרָנוֹת, וְלֹא עַל פִּי עֵד אֶחָד.
ה כּוֹהֵן מְיֻחָס שֶׁאָמַר בְּנִי הוּא זֶה, וְכוֹהֵן הוּא--אֵין מַעֲלִין אוֹתוֹ לְיֵחוּסִין עַל פִּיו, עַד שֶׁיָּבִיא עֵדִים שְׁהוּא בְּנוֹ.
ו כּוֹהֵן מְיֻחָס שֶׁיָּצָא הוּא וְאִשְׁתּוֹ שֶׁיָּדַעְנוּ שְׁהִיא כְּשֵׁרָה, לִמְדִינָה אַחֶרֶת, וּבָא הוּא וְהִיא, וּבָנִים כְּרוּכִין אַחֲרֶיהָ, וְאָמַר אִשָּׁה שֶׁיָּצַאת עִמִּי הִיא זוֹ, וְאֵלּוּ בָּנֶיהָ--אֵינוּ צָרִיךְ לְהָבִיא עֵדִים לֹא עַל הָאִשָּׁה, וְלֹא עַל הַבָּנִים. מֵתָה, וְאֵלּוּ בָּנֶיהָ--צָרִיךְ לְהָבִיא עֵדִים שֶׁאֵלּוּ בָּנֶיהָ; וְאֵינוּ צָרִיךְ לְהָבִיא עֵדִים עַל אִמָּן שֶׁהָיְתָה כְּשֵׁרָה, מִפְּנֵי שֶׁכְּבָר הֻחְזַק שֶׁיָּצָא מֵעִמָּנוּ בְּאִשָּׁה כְּשֵׁרָה.
ז יָצָא כּוֹהֵן מְיֻחָס לִמְדִינָה אַחֶרֶת, וּבָא הוּא וְאִשְׁתּוֹ וּבָנָיו, וְאָמַר אִשָּׁה זוֹ נָשָׂאתִי, וְאֵלּוּ בָּנֶיהָ--צָרִיךְ לְהָבִיא עֵדִים שֶׁאִשָּׁה זוֹ כְּשֵׁרָה, וְאֵינוּ מֵבִיא עֵדִים שֶׁאֵלּוּ בָּנֶיהָ: וְהוּא, שֶׁיִּהְיוּ כְרוּכִין אַחֲרֶיהָ. וְאִם בָּא בִּשְׁתֵּי נָשִׁים, וְהֵבִיא רְאָיָה עַל הָאַחַת--אַף עַל פִּי שֶׁהַבָּנִים קְטַנִּים וּכְרוּכִין אַחֲרֶיהָ, צָרִיךְ לְהָבִיא רְאָיָה עֲלֵיהֶם: שֶׁמֶּא בָּנָיו מִן הָאַחֶרֶת הֶם, וְנִכְרְכוּ אַחַר זוֹ הַמְּיֻחֶסֶת.
ח בָּא הוּא וּבָנָיו, וְאָמַר אִשָּׁה נָשָׂאתִי וּמֵתָה, וְאֵלּוּ בָּנֶיהָ--מֵבִיא עֵדִים שֶׁאוֹתָהּ הָאִשָּׁה כְּשֵׁרָה הָיְתָה, וְשֶׁאֵלּוּ בָּנֶיהָ. וְכַדִּין הַזֶּה דָּנִין בְּיִשְׂרָאֵל מְיֻחָס, וּבְלֵוִי מְיֻחָס; וְאַחַר כָּךְ נָעִיד עַל בְּנוֹ זֶה שְׁהוּא מְיֻחָס, כְּדֵי שֶׁיִּהְיֶה רָאוּי לַסַּנְהֶדְּרִין.
ט אֵין מַעֲלִין מִשְּׁטָרוֹת לַכְּהֻנָּה. כֵּיצַד: הֲרֵי שֶׁהָיָה בַּשְּׁטָר פְּלוֹנִי כּוֹהֵן לָוָה מִפְּלוֹנִי אוֹ הִלְוָהוּ כָּךְ וְכָּךְ, וְהָעֵדִים מִלְּמַטָּה--אֵין מַחְזִיקִין כּוֹהֵן זֶה שְׁהוּא מְיֻחָס, שֶׁמֶּא לֹא הֵעִידוּ אֵלָא עַל הַמַּלְוָה. בַּמֶּה דְּבָרִים אֲמוּרִים, לְעִנְיַן יֵחוּס. אֲבָל לַחֲזָקָה שֶׁיִּהְיֶה בְּחֶזְקַת כּוֹהֵן כְּכוֹהֲנֵי זְמָן זֶה, וְיֹאכַל בִּתְרוּמָה וְחַלָּה שֶׁלְּדִבְרֵי סוֹפְרִים, וּבִשְׁאָר קָדְשֵׁי הַגְּבוּל--מַעֲלִין מִן הַשְּׁטָרוֹת, וְעַל פִּי עֵד אֶחָד, וּמִנְּשִׂיאוּת כַּפַּיִם, וּמִקְּרִיאָה בַּתּוֹרָה רִאשׁוֹן.
י וְכֵן כּוֹהֵן שֶׁאָמַר בְּנִי זֶה כּוֹהֵן--נֶאֱמָן לְהַאֲכִילוֹ בִּתְרוּמָה, וְלִהְיוֹתוֹ בְּחֶזְקַת כּוֹהֵן; וְאֵינוּ צָרִיךְ לְהָבִיא רְאָיָה, לֹא עַל הַבָּנִים וְלֹא עַל הָאִשָּׁה.
יא שְׁנַיִם שֶׁבָּאוּ לִמְדִינָה, זֶה אוֹמֵר אֲנִי וַחֲבֵרִי כּוֹהֵן, וְזֶה הַשֵּׁנִי אוֹמֵר אֲנִי וַחֲבֵרִי כּוֹהֵן--אַף עַל פִּי שֶׁנִּרְאִין כְּגוֹמְלִין זֶה אֶת זֶה, הֲרֵי אֵלּוּ נֶאֱמָנִין; וּשְׁנֵיהֶם בְּחֶזְקַת כּוֹהֲנִים. וְכֵן עֵד אֶחָד שֶׁאָמַר רָאִיתִי זֶה שֶׁנָּשָׂא כַּפָּיו, אוֹ שֶׁאָכַל בִּתְרוּמָה, אוֹ שֶׁחָלַק עַל הַגֹּרֶן, אוֹ שֶׁקָּרָא בַּתּוֹרָה רִאשׁוֹן וְקָרָא אַחֲרָיו לֵוִי--מַחְזִיקִין אוֹתוֹ לַכְּהֻנָּה עַל פִּיו. וְכֵן אִם הֵעִיד שֶׁזֶּה קָרָא שֵׁנִי בַּתּוֹרָה אַחַר כּוֹהֵן, מַחְזִיקִין אוֹתוֹ בַּלְּוִיָּה.
יב הֵעִיד שֶׁרָאָה זֶה שֶׁחָלַק עִם אֶחָיו בְּבֵית דִּין, תְּרוּמָה שֶׁהִנִּיחַ לָהֶן אֲבִיהֶן הַכּוֹהֵן--אֵין מַעֲלִין אוֹתוֹ לַכְּהֻנָּה בְּעֵדוּת זוֹ: שֶׁמֶּא חָלָל הוּא, וְלָקַח חֵלֶק יְרֻשָּׁתוֹ מִתְּרוּמָה לְמָכְרָהּ.
יג מִי שֶׁבָּא בַּזְּמָן הַזֶּה, וְאָמַר כּוֹהֵן אֲנִי--אֵינוּ נֶאֱמָן, וְאֵין מַעֲלִין אוֹתוֹ לַכְּהֻנָּה עַל פִּי עַצְמוֹ: וְלֹא יִקְרָא בַּתּוֹרָה רִאשׁוֹן, וְלֹא יִשָּׂא אֶת כַּפָּיו, וְלֹא יֹאכַל בְּקָדְשֵׁי הַגְּבוּל--עַד שֶׁיִּהְיֶה לוֹ עֵד אֶחָד. אֲבָל אוֹסֵר עַצְמוֹ בִּגְרוּשָׁה וְזוֹנָה וַחֲלָלָה, וְאֵינוּ מִטַּמֵּא לַמֵּתִים. וְאִם נָשָׂא, אוֹ נִטְמָא--לוֹקֶה; וְהַנִּבְעֶלֶת לוֹ סְפֵק חֲלָלָה.
יד וְאִם הָיָה מֵסִיחַ לְפִי תֻּמּוֹ, נֶאֱמָן.טו כֵּיצַד: מַעֲשֶׂה בְּאֶחָד שֶׁהָיָה מֵסִיחַ לְפִי תֻּמּוֹ וְאָמַר, זָכוּר אֲנִי כְּשֶׁאֲנִי תִּינוֹק, וְהָיִיתִי מֻרְכָּב עַל כְּתֵפוֹ שֶׁלְּאָבִי שֶׁהוֹצִיאַנִי מִבֵּית הַסֵּפֶר, וְהִפְשִׁיטַנִי כֻּתָּנְתִּי וְהִטְבִּילַנִי לֶאֱכֹל תְּרוּמָה לָעֶרֶב, וַחֲבֵרַי בּוֹדְלִין מִמֶּנִּי, וְהָיוּ קוֹרְאִין אוֹתִי יוֹחָנָן אוֹכֵל חַלּוֹת; וְהֶעֱלָהוּ רַבֵּנוּ הַקָּדוֹשׁ לַכְּהֻנָּה, עַל פִּי עַצְמוֹ.
טו נֶאֱמָן הַגָּדוֹל לוֹמַר זָכוּר אֲנִי כְּשֶׁהָיִיתִי קָטָן, וְרָאִיתִי פְּלוֹנִי טוֹבֵל וְאוֹכֵל בַּתְּרוּמָה לָעֶרֶב; וּמַחְזִיקִין אוֹתוֹ בַּכְּהֻנָּה, בְּעֵדוּתוֹ. מִי שֶׁבָּא בַּזְּמָן הַזֶּה, וְאָמַר כּוֹהֵן אֲנִי, וְעֵד אֶחָד מֵעִיד לוֹ, שֶׁאֲנִי יוֹדֵעַ בְּאָבִיו שֶׁלְּזֶה שְׁהוּא כּוֹהֵן--אֵין מַעֲלִין אוֹתוֹ לַכְּהֻנָּה בְּעֵדוּת זוֹ, שֶׁמֶּא חָלָל הוּא: עַד שֶׁיָּעִיד, שֶׁזֶּה כּוֹהֵן הוּא. אֲבָל אִם הֻחְזַק אָבִיו כּוֹהֵן, אוֹ שֶׁבָּאוּ שְׁנַיִם וְהֵעִידוּ שֶׁאָבִיו שֶׁלְּזֶה כּוֹהֵן--הֲרֵי הוּא בְּחֶזְקַת אָבִיו.
טז מִי שֶׁהֻחְזַק אָבִיו כּוֹהֵן, וְיָצָא עָלָיו קוֹל שְׁהוּא בֶּן גְּרוּשָׁה, אוֹ בֶּן חֲלוּצָה--חוֹשְׁשִׁין לוֹ, וּמוֹרִידִין אוֹתוֹ; בָּא עֵד אֶחָד אַחַר כָּךְ וְהֵעִיד שְׁהוּא כָּשֵׁר, מַעֲלִין אוֹתוֹ לַכְּהֻנָּה עַל פִּיו. בָּאוּ שְׁנַיִם אַחַר כָּךְ וְהֵעִידוּ שְׁהוּא חָלָל, מוֹרִידִין אוֹתוֹ מִן הַכְּהֻנָּה; בָּא עֵד אֶחָד אַחַר כָּךְ וְהֵעִיד שְׁהוּא כָּשֵׁר, מַעֲלִין אוֹתוֹ לַכְּהֻנָּה--שֶׁזֶּה הָאַחֲרוֹן מִצְטָרֵף לְעֵד רִאשׁוֹן, וַהֲרֵי שְׁנֵיהֶם מְעִידִין שְׁהוּא כָּשֵׁר, וּשְׁנַיִם מְעִידִים שְׁהוּא פָּסוּל: יִדָּחוּ אֵלּוּ וְאֵלּוּ וְיִדָּחֶה הַקּוֹל, שֶׁהַשְּׁנַיִם כְּמֵאָה--וְיִשָּׁאֵר כּוֹהֵן בְּחֶזְקַת אָבִיו.
יז אִשָּׁה שֶׁלֹּא שָׁהָת שְׁלוֹשָׁה חֳדָשִׁים אַחַר בַּעְלָהּ, וְיָלְדָה, וְאֵין יָדוּעַ אִם בֶּן תִּשְׁעָה לָרִאשׁוֹן אִם בֶּן שִׁבְעָה לָאַחֲרוֹן, וְהָיָה אֶחָד מֵהֶן כּוֹהֵן וְהַשֵּׁנִי יִשְׂרָאֵל--הֲרֵי זֶה סְפֵק כּוֹהֵן; וְכֵן אִם נִתְעָרַב וֶלֶד כּוֹהֵן בְּוֶלֶד יִשְׂרָאֵל, וְהִגְדִּילוּ הַתַּעֲרֹבֶת--כָּל אֶחָד מֵהֶן סְפֵק כּוֹהֵן. וְנוֹתְנִין עֲלֵיהֶן חֻמְרֵי יִשְׂרָאֵל, וְחֻמְרֵי כּוֹהֲנִים: נוֹשְׂאִין נָשִׁים הָרְאוּיוֹת לַכְּהֻנָּה, וְאֵינָן מִטַּמְּאִים לַמֵּתִים, וְלֹא אוֹכְלִין בִּתְרוּמָה; וְאִם נָשְׂאוּ גְּרוּשָׁה, מוֹצִיאִין וְאֵינָן לוֹקִין.
יח שְׁנֵי כּוֹהֲנִים שֶׁנִּתְעָרְבוּ וַלְדוֹתֵיהֶם, אוֹ אֵשֶׁת כּוֹהֵן שֶׁלֹּא שָׁהָת אַחַר בַּעְלָהּ שְׁלוֹשָׁה חֳדָשִׁים, וְנִשֵּׂאת לְכוֹהֵן אַחֵר, וְאֵין יָדוּעַ אִם בֶּן תִּשְׁעָה לָרִאשׁוֹן אוֹ בֶּן שִׁבְעָה לָאַחֲרוֹן--נוֹתְנִין עַל הַוֶּלֶד חֻמְרֵי שְׁנֵיהֶם: הוּא אוֹנֵן עֲלֵיהֶם, וְהֶן אֵינָן אוֹנְנִין עָלָיו, הוּא אֵין מִטַּמֵּא לָהֶם, וְהֶם אֵינָן מִטַּמְּאִין לוֹ; וְעוֹלֶה בְּמִשְׁמָרוֹ שֶׁלְּזֶה וְשֶׁלְּזֶה, וְאֵינוּ חוֹלֵק--וְאִם הָיוּ שְׁנֵיהֶם בְּמִשְׁמָר אֶחָד וּבֵית אָב אֶחָד, נוֹטֵל חֵלֶק אֶחָד.
יט בַּמֶּה דְּבָרִים אֲמוּרִים, בִּזְמָן שְׁהֶן בָּאִין מִכּוֹחַ נִשּׂוּאִין. אֲבָל בִּזְנוּת, גָּזְרוּ חֲכָמִים שֶׁמְּשַׁתְּקִין אוֹתוֹ מִדִּין כְּהֻנָּה כְּלָל--הוֹאִיל וְאֵינוּ יוֹדֵעַ אָבִיו הַוַּדַּאי וְנֶאֱמָר "וְהָיְתָה לּוֹ וּלְזַרְעוֹ אַחֲרָיו" (במדבר כה,יג), עַד שֶׁיִּהְיֶה זַרְעוֹ מְיֻחָס אַחֲרָיו.
כ כֵּיצַד: עֲשָׂרָה כּוֹהֲנִים שֶׁפֵּרַשׁ אֶחָד מֵהֶם וּבָעַל, שֶׁהֲרֵי הַוֶּלֶד כּוֹהֵן וַדַּאי, וְאַף עַל פִּי כֵן, הוֹאִיל וְאֵינוּ יוֹדֵעַ אָבִיו שֶׁיִּתְיַחַס לוֹ--מְשַׁתְּקִין אוֹתוֹ מִדִּין כְּהֻנָּה; וְאֵינוּ עוֹבֵד, וְלֹא אוֹכֵל תְּרוּמָה, וְלֹא חוֹלֵק. וְאִם נִטַּמֵּא לַמֵּתִים, אוֹ נָשָׂא גְּרוּשָׁה--לוֹקֶה, שְׁאֵין כָּאן סְפֵק הֶתֵּר.
Laws of Issurei Bi'ah, Chapter 20
1. All the kohanim of the present time are kohanim by presumption (chazakah), and they eat only sacred foods of the outlying areas, provided it is terumah of Rabbinic status. But terumah of Torah status and challah of Torah status may be eaten only by a kohen of established lineage (meyuchas).
2. Who is a kohen of established lineage? One for whom two witnesses have testified that he is a kohen, the son of so-and-so the kohen, and so-and-so the son of so-and-so, back to a certain man who was the kohen who served upon the altar; for had the Great Beis Din not investigated him, they would not have allowed him to serve. Therefore we do not investigate from the altar upward, nor from the Sanhedrin upward, for only kohanim, levi'im and Yisraelim of established lineage are appointed to the Sanhedrin.
3. Challah at the present time, even in Eretz Yisrael, is not of Torah status, as it says, "בְּבֹאֲכֶם, אֶל-הָאָרֶץ" ("when you come to the land," Bamidbar 15:18), meaning the coming of all of you, not the coming of some of you; and when they went up in the days of Ezra, not all of them went up. Likewise terumah at the present time is by the words of the Scribes, and therefore the kohanim of our time, who are kohanim by presumption, eat it.
4. One for whom witnesses testified that they saw him eating terumah of Torah status is of established lineage. But we do not raise a person to established lineage on the basis of the priestly blessing, or of being called first to the Torah, or of the distribution of terumah at the threshing floors, or on the word of one witness.
5. A kohen of established lineage who said, "This is my son, and he is a kohen," does not raise him to established lineage on his word until he brings witnesses that he is his son.
6. A kohen of established lineage and his wife, whom we knew to be fit, went out to another country, and he and she came back with children clinging to her, and he said, "This is the woman who went out with me, and these are her children": he need not bring witnesses either about the woman or about the children. If he said, "She died, and these are her children," he must bring witnesses that these are her children, but he need not bring witnesses that their mother was fit, because it is already established that he left us with a fit wife.
7. If a kohen of established lineage went out to another country, and came back with his wife and children, and said, "I married this woman, and these are her children," he must bring witnesses that this woman is fit, but he need not bring witnesses that these are her children, provided they cling to her. If he came with two wives, and brought proof about one of them, then even though the children are small and cling to her, he must bring proof about them, for perhaps they are his children from the other wife and have attached themselves to this one of established lineage.
8. If he came back with his children, and said, "I married a woman who died, and these are her children," he brings witnesses that that woman was fit and that these are her children. By this same law we judge a Yisrael of established lineage and a Levi of established lineage; and afterwards we testify about this son of his that he is of established lineage, so that he will be fit for the Sanhedrin.
9. We do not raise a person to the kehunah on the basis of documents. How so? If a document read, "So-and-so the kohen borrowed from so-and-so," or "lent him such-and-such," with the witnesses signed below, we do not presume this kohen to be of established lineage, for perhaps they testified only about the loan. In what case does this apply? With regard to established lineage. But as for presumption, that he should have the presumed status of a kohen like the kohanim of this time, and eat terumah and challah of the Scribes' status and the other sacred foods of the outlying areas, we do raise him on the basis of documents, on the word of one witness, from the priestly blessing and from being called first to the Torah.
10. Likewise a kohen who said, "This son of mine is a kohen," is believed to have him eat terumah and to give him the presumed status of a kohen, and he need not bring proof either about the children or about the woman.
11. Two men who came to a town, the one saying, "I and my companion are kohanim," and the second saying, "I and my companion are kohanim": even though they appear to be doing each other a favor, they are believed, and both have the presumed status of kohanim. Likewise one witness who said, "I saw this man raise his hands in the priestly blessing," or "eat terumah," or "take a share at the threshing floor," or "read first in the Torah with a Levi reading after him": we give him the presumed status of a kohen on the witness's word. Likewise if he testified that this man read second in the Torah after a kohen, we give him the presumed status of a Levi.
12. If he testified that he saw this man divide with his brothers in beis din terumah that their father the kohen had left them, we do not raise him to the kehunah on this testimony, for perhaps he is a chalal and took his share of the inheritance from the terumah in order to sell it.
13. One who comes at the present time and says, "I am a kohen," is not believed, and we do not raise him to the kehunah on his own word. He may not read first in the Torah, raise his hands in the priestly blessing, or eat sacred foods of the outlying areas until he has one witness. But he forbids himself a divorcee, a zonah and a chalalah, and he may not become impure through the dead. If he married one of them or became impure, he receives lashes; and a woman who had relations with him is a doubtful chalalah.
14. If he was speaking innocently, without intent to testify, he is believed. How so? It happened that a man was speaking innocently and said, "I remember when I was a child, riding on my father's shoulder, and he took me out of school, took off my shirt and immersed me so that I could eat terumah in the evening, and my friends kept apart from me and used to call me 'Yochanan, eater of challos'"; and Rabbeinu HaKadosh raised him to the kehunah on his own word.
15. An adult is believed to say, "I remember when I was small, and I saw so-and-so immerse and eat terumah in the evening," and we give that person the presumed status of a kohen on his testimony. One who comes at the present time and says, "I am a kohen," and one witness testifies for him, "I know that this man's father is a kohen": we do not raise him to the kehunah on this testimony, for perhaps he is a chalal, unless the witness testifies that this man himself is a kohen. But if his father is presumed to be a kohen, or two came and testified that this man's father is a kohen, he has the presumed status of his father.
16. One whose father was presumed to be a kohen, and a rumor went out about him that he is the son of a divorcee or the son of a chalutzah: we take it into account and remove him. If one witness then came and testified that he is fit, we raise him to the kehunah on that witness's word. If two then came and testified that he is a chalal, we remove him from the kehunah. If one witness then came and testified that he is fit, we raise him to the kehunah, for this last witness joins with the first witness, so that two testify that he is fit and two testify that he is unfit. The two sets cancel each other and the rumor is dismissed, for two are like a hundred, and he remains a kohen with the presumed status of his father.
17. A woman who did not wait three months after her husband and gave birth, and it is not known whether the child is a nine-month child of the first husband or a seven-month child of the last, where one of them was a kohen and the other a Yisrael: this child is a doubtful kohen. Likewise if a kohen's child became mixed up with a Yisrael's child, and the mixed-up children grew up, each of them is a doubtful kohen. We apply to them the stringencies of Yisraelim and the stringencies of kohanim: they marry women fit for the kehunah, may not become impure through the dead, and do not eat terumah; and if they married a divorcee, they must send her away, but they do not receive lashes.
18. Two kohanim whose children became mixed up, or the wife of a kohen who did not wait three months after her husband and married another kohen, and it is not known whether the child is a nine-month child of the first or a seven-month child of the last: we apply to the child the stringencies of both. He is an onen for them, but they are not onenim for him; he may not become impure for them, and they may not become impure for him. He goes up to serve in the watch of each one, but does not receive a share; and if both were in one watch and one father's house, he takes one share.
19. In what case does this apply? When they come through marriage. But with promiscuity, the Sages decreed that he is excluded from the law of the kehunah altogether, since he does not know his definite father, and it says, "וְהָיְתָה לּוֹ וּלְזַרְעוֹ אַחֲרָיו" ("and it shall be for him and for his offspring after him," Bamidbar 25:13), which requires that his offspring trace their lineage after him.
20. How so? Ten kohanim, one of whom left the group and had relations: the child is certainly a kohen, and nevertheless, since he does not know his father to whom to trace his lineage, he is excluded from the law of the kehunah. He does not serve, does not eat terumah and does not receive a share. And if he became impure through the dead or married a divorcee, he receives lashes, for there is no doubtful permission here.