550 —הפסקות בחיובי מצוות ודיני קריאת שמע, תפילה ותלמוד תורה

Shalom u'Vrachah! [16 Kislev 5710]

Regarding your question on my explanation in Shulchan Aruch Admur about the laws of interruption when the measure is divided concerning tzitzit, etc., I said this is similar to the law of 'shehah ligmor et kulah' (delayed completion) in Kriat Shema and Tefillah. You challenge that for Kriat Shema and Tefillah, only an involuntary delay interrupts, unlike the above case. However, this does not affect my answer: even if you do not accept my explanation, there still needs to be a rationale for why in Kriat Shema and Tefillah a non-involuntary delay does not interrupt, unlike the above. The distinction is simple: Kriat Shema and Tefillah are obligations that remain until fulfilled; one cannot simply interrupt his obligation—only a 'strong reason,' an involuntary circumstance, can remove him from his obligation mid-way. In contrast, in the above cases—even though he is performing a mitzvah—he has already fulfilled his obligation.

As for your question from Shulchan Aruch Admur at the end of Siman 8: 'One who sleeps during the day,' etc.—sleep is different because it is an interruption done unintentionally. See there in section 26. In section 34 it appears to be a typographical error; it should read Ramam (Maharam Mintz).

Additional note added later: It requires further analysis regarding Torah study—that with the morning blessing over Torah study one is exempt all day even if he was forced to stop or slept, etc. It can be explained that the obligation of Torah study is so strong that it says about it 'Ki dvar Hashem bazah...' ('For he has despised the word of G‑d...')—even at a time of compulsion he remains obligated; only that a lion stands over him (i.e., he is prevented by force). Still, it requires explanation why even an unlearned person who cannot study is exempted by the morning blessing over Torah study even after reciting Kriat Shema at night—even though his idle talk was permissible (see Tanya ch. 8). Further analysis is needed regarding one who becomes an onen (a mourner whose deceased relative has not yet been buried) whose relative died and was immediately buried—he is exempt from all mitzvot (see Shulchan Aruch Admur 681 and elsewhere), which constitutes the greatest possible interruption.

Summary

The Rebbe analyzes halachic nuances regarding what constitutes an interruption in fulfilling mitzvah obligations versus ongoing requirements like prayer or Torah study. He highlights how different circumstances affect one's status and obligation to continue or repeat mitzvot.