Hadith 1610
´It was narrated that ‘Abdullah bin Ja’far said:` “When news of the death of Ja’far was brought, the Messenger of Allah (ﷺ) said: ‘Prepare food for the family of Ja’far, for there has come to them that which is keeping them busy or something which is keeping them busy.”
Hadith 1611
´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."