Moed Katan 27A

אם יכול למעט בעסקו ⁠— ימעט, ואם לאו ⁠— יגלגל עמהן.

if he can reduce his business, he should reduce it; and if not, he may carry on with them, i.e., his business partners. He may act in partnership with the members of the group with which he is traveling, but he may not engage in business independently.

תנו רבנן: מאימתי כופין את המטות ⁠— משיצא מפתח ביתו, דברי רבי אליעזר. רבי יהושע אומר: משיסתם הגולל.

§ A baraita states the following baraita: From when do the mourners overturn their beds? From when the corpse is taken out of the opening of his house; this is the statement of R' Eliezer. R' Yehoshua says: From when the tomb is sealed with the grave cover.

מעשה שמת רבן גמליאל הזקן, כיון שיצא מפתח ביתו אמר להם רבי אליעזר: כפו מטותיכם. וכיון שנסתם הגולל, אמר להם רבי יהושע: כפו מטותיכם. אמרו לו: כבר כפינו על פי זקן.

There was an incident in which the Nasi Rabban Gamliel the Elder died, and once his body left the opening of his house, R' Eliezer said to the members of the household: Overturn your beds. And once the tomb was sealed with the grave cover, R' Yehoshua said to them: Overturn your beds. They then said to him: We already overturned them in accordance with the Elder, i.e., R' Eliezer.

תנו רבנן: מאימתי זוקפין את המטות בערב שבת ⁠— מן המנחה ולמעלה. אמר רבה בר הונא: אף על פי כן אינו יושב עליה עד שתחשך. ולמוצאי שבת, אף על פי שאין לו לישב אלא יום אחד ⁠— חוזר וכופה.

A baraita states: From when do the mourners stand their beds upright on Friday; as the rites of mourning are not observed on Shabbat, and the beds must be returned to their ordinary position beforehand? From minḥa time onward. Rabba bar Huna said: Even so, one may not sit down on his upright bed immediately. Rather, he must wait until it becomes dark to do so. And at the conclusion of Shabbat, even if he has only one more day to sit in mourning, i.e., his period of mourning concludes on Sunday, he must once again overturn his bed.