מקור המאמר עתידה ארץ ישראל שתתפשט בכל הארצות

B"H, 6 Elul, 5713.

Brooklyn.

Haraha"g vaharaha"ch iy"a nu"n Mohar Shaul Yissachar

Shalom u'Vrachah!

I hereby acknowledge receipt of your letter from before Rosh Chodesh Elul.

As we approach the new year that is coming upon us and all Israel for good and blessing, I hereby express my blessing to you and your household, may they live, a blessing for being inscribed and sealed for a good and sweet year in both material and spiritual matters.

With blessing.

P.S.: In your question regarding the source of the saying 'Atidah Eretz Yisrael shetispashet b'chol ha'aratzot' (Eretz Yisrael will in the future expand to all lands), see Pesikta Rabbati on Shabbat and Rosh Chodesh, Pesikta d'Rav Kahana (section Rani Akara), Sifrei Devarim 1, Yalkut Yeshayahu remez 703, Shu"t Be'er Moshe by R. M. Yerushalimsky page 270.

Summary

The Rebbe responds with blessings for the new year and directs the questioner to classical sources regarding the teaching that Eretz Yisrael will expand to all lands, emphasizing diligent Torah study and seeking authentic sources.