Muwatta Malik 886
موطأ مالك#886Sahihحَدَّثَنِي يَحْيَى، عَنْ مَالِكٍ، عَنْ جَعْفَرِ بْنِ مُحَمَّدٍ، عَنْ أَبِيهِ، عَنْ عَلِيِّ بْنِ أَبِي طَالِبٍ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم نَحَرَ بَعْضَ هَدْيِهِ وَنَحَرَ غَيْرُهُ بَعْضَهُ .
Yahya related to me from Malik from Jafar ibn Muhammad from his father from Ali ibn Abi Talib that the Messenger of Allah, may Allah bless him and grant him peace, killed some of his sacrificial animals himself, and someone else killed the rest
Scholarly Authentication
The label above is the grade most of these scholars gave — one dissenting opinion no longer speaks for all of them. If any scholar calls a narration fabricated, that verdict is shown instead, whatever the others say. Each scholar's own wording:
Salim al-HilaliSahih
In-book reference: 20:182