Moed Katan 23A

וקורין שבעה, ויוצאין. רבי יהושע בן קרחה אומר: לא שילכו ויטיילו בשוק, אלא יושבין ודווין.

and 7 people read from the Torah. And then they leave and pray on their own. R' Yehoshua ben Korḥa says: It is not that they stroll afterward in the marketplace, but rather they sit at home in silent mourning.

ואין אומרים שמועה ואגדה בבית האבל. אמרו עליו על רבי חנניה בן גמליאל שהיה אומר שמועה ואגדה בבית האבל.

And furthermore, one may not speak about halakha or aggada in a house of mourning, as this is an activity that brings people joy. It was said of R' Ḥananya ben Gamliel that he would speak about halakha and aggada in a house of mourning.

תנו רבנן: אבל, שבת ראשונה ⁠— אינו יוצא מפתח ביתו, שניה ⁠— יוצא ואינו יושב במקומו, שלישית ⁠— יושב במקומו ואינו מדבר, רביעית ⁠— הרי הוא ככל אדם.

§ A baraita states the following baraita: During the 1st week after his bereavement, the mourner may not go out of the opening of his house. During the 2nd week, he may go out, but he may not sit in his usual place in the synagogue. During the 3rd week, he may sit in his usual place but he may not speak. During the 4th week, he is like any other person.

רבי יהודה אומר: לא הוצרכו לומר שבת ראשונה לא יצא מפתח ביתו, שהרי הכל נכנסין לביתו לנחמו. אלא: שניה ⁠— אינו יוצא מפתח ביתו, שלישית ⁠— יוצא ואינו יושב במקומו, רביעית ⁠— יושב במקומו ואינו מדבר, חמישית ⁠— הרי הוא ככל אדם.

R' Yehuda says: They did not need to say that during the 1st week the mourner may not go out of the opening of his house. This teaches us nothing new, as at that time everyone goes into his house to console him. Rather, during the 2nd week, he may not go out of the opening of his house. During the 3rd week, he may go out, but he may not sit in his usual place in the synagogue. During the 4th week, he may sit in his usual place, but he may not speak. During the 5th week, he is like any other person.