Asma’ bint ‘Umais said:“When Ja’far was killed, the Messenger of Allah (ﷺ) went to his family and said: ‘The family of Ja’far are busy with the matter of their deceased, so prepare food for them.’” (One of the narrators) Abdullah said: "That continued to be the Sunnah, until innovations were introduced, then it was abandoned

English translation · Sunan Ibn Majah