7. The prayers and learning of Mishnayos in the Shiva home:

See Chapter 17-18!

Eating foods and taking items from a Shiva home?[1]

Some[2] are accustomed not to eat any food, or take any item, from the Shiva home throughout the seven days of Shiva.[3] Others[4] rule there is no need to be particular in this matter, and that so is the custom of many to eat food in the Shiva home after Shacharis. Some[5] write that the custom to be stringent in this matter [according to the first opinion] only applies to the house in which the person passed away. However, if the person did not pass away in the Shiva home then there is no need to refrain from eating food in the home. [Practically, the widespread Ashkenazi custom is not to eat any foods in any Shiva home throughout Shiva. While the Sephardic custom is on the contrary, to honor the visitors with food. Many Chabad Rabbanim have testified to this custom of avoiding eating in a Shiva home and that one is to abide by it.[6] However, there are Chassidishe homes that offer the comforters food and drink.[7] Seemingly, on Shabbos there is room to be lenient according to all.[8]]

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[1] See Nitei Gavriel 92:1; Sefer Shemiras Haguf Vihanefesh [Lerner] 202:1

[2] Elya Raba O.C. 224:7; Rav Akiva Eiger 376; Beis Lechem Yehuda 376 that so is the custom in these provinces; Aruch Hashulchan 376:11; Mishmeres Shalom Mem 60; Keser Shem Tov p. 684; Kaf Hachaim 224:46

[3] The reason: As there is a spirit of impurity that resides in the house of the Avel throughout the seven days. [ibid]

[4] Yosef Ometz p. 330; Noheg Katzon Yosef p. 50; Ikarei Hadaat 34:30; Chaim Bayad 125; Yabia Omer 4:35; Nitei Gavriel ibid footnote 5; Nishmas Yisrael p. 130

[5] Nitei Gavriel ibid in name of Misgeres Hashulchan 376 and Even Yaakov 42

[6] Rav Eli Landa stated that his father was very careful in this matter, and so he saw accustomed amongst Chassidim to be careful; Rav Yeruslavsky stated the custom is to be stringent; Rav Gluchovsky stated the Chabad custom is to be stringent; Rav A.L. Hakohen told me the custom in all Ashkenazi circles is to be stringent in this.

[7] Nitei Gavriel ibid footnote 5; Rabbi Leibel Groner in a correspondence related that he witnessed in many Chassidishe homes to offer Lechayim and Mezonos after Shacharis.

[8] See Shivlei Haleket 23 that the adherence of not drinking form the cup of an Avel does not apply on Shabbos; See Nitei Gavriel ibid footnote 21