We used to consider gathering at the family of the deceased and preparing food after burial to be a form of wailing.
كنا نرى الاجتماع إلى أهل الميت، وصنيعة الطعام من النياحة.
Ibn Majah (1612) narrated it by two paths. The first, from Muhammad bin Yahya, who said, Saeed bin Mansur told us, who said, Hushaym told us, from Ismail bin Abu Khalid, from Qays bin Abu Hazim, from Jareer bin Abdullah, and he related the hadith. The second, from Shujaa bin Makhlad Abul-Fadl, who said, Hushaym told us with his chain of transmission. This chain is sahih. Busiri said in Zawaid, "The narrators of the first path meet the standard of Bukhari, and the second meets the standard of Muslim," and Nawawi graded it sahih in Majmu (5/320).Ahmad (6905) narrated it from Nasr bin Bab, from Ismail with his chain of transmission, and it contains, "Preparing food after his burial is a form of wailing." Nasr bin Bab is among the narrators of Tajeel, and the scholars are unanimous in judging him daif, but he has been corroborated, as you have seen in Ibn Majah.As for his statement, "We used to consider gathering," Sindi said, "This has the standing of a report of the consensus of the companions, or of the Prophet's ﷺ tacit approval, and on the second reading, its ruling is that of a statement attributed to the Prophet, and on both readings it constitutes a legal proof." He then said, "In sum, this is the reverse of what has been transmitted, since what has been transmitted is that people prepare food for the family of the deceased, so for people to gather at the deceased's household to the point that the family must go to the trouble of preparing food for them is a reversal of that. Many jurists have mentioned that offering hospitality on account of a death is a reversal of what is reasonable, because hospitality by its nature should be for joy, not for grief." End of quote.