وَ أَوْصَى أَبُو جَعْفَرٍ ع بِثَمَانِمِائَةِ دِرْهَمٍ لِمَأْتَمِهِ وَ كَانَ يَرَى ذَلِكَ لِلسُّنَّةِ لِأَنَّ رَسُولَ اللَّهِ ص قَالَ اتَّخِذُوا لآِلِ جَعْفَرِ بْنِ أَبِي طَالِبٍ طَعَاماً فَقَدْ شُغِلُوا.
English translationBab Ul Qaim Publications
Hadith.546 - Imam al-Baqir (as) made a will specifying 800 dirhams to be used for his mourning gathering (ma'tam), as he saw this as part of the tradition (sunnah). This was because the Messenger of Allah (sw) said: "Prepare food for the family of Ja'far ibn Abi Talib, for they are preoccupied [by their loss]."
Translation: Bab Ul Qaim Publications·Thaqalayn link·The Arabic above is the original.