Sahih al-Bukhari 4216
صحيح البخاري#4216Sahihحَدَّثَنِي يَحْيَى بْنُ قَزَعَةَ، حَدَّثَنَا مَالِكٌ، عَنِ ابْنِ شِهَابٍ، عَنْ عَبْدِ اللَّهِ، وَالْحَسَنِ، ابْنَىْ مُحَمَّدِ بْنِ عَلِيٍّ عَنْ أَبِيهِمَا، عَنْ عَلِيِّ بْنِ أَبِي طَالِبٍ ـ رضى الله عنه ـ أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم نَهَى عَنْ مُتْعَةِ النِّسَاءِ يَوْمَ خَيْبَرَ، وَعَنْ أَكْلِ الْحُمُرِ الإِنْسِيَّةِ.
Narrated `Ali bin Abi Talib:On the day of Khaibar, Allah's Messenger (ﷺ) forbade the Mut'a (i.e. temporary marriage) and the eating of donkey-meat
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:
Every narration in Sahih al-Bukhari is accepted as Sahih (authentic) by the established status of the book.
In-book reference: 64:256