Sahih al-Bukhari 5521
صحيح البخاري#5521Sahihحَدَّثَنَا صَدَقَةُ، أَخْبَرَنَا عَبْدَةُ، عَنْ عُبَيْدِ اللَّهِ، عَنْ سَالِمٍ، وَنَافِعٍ، عَنِ ابْنِ عُمَرَ ـ رضى الله عنهما ـ نَهَى النَّبِيُّ صلى الله عليه وسلم عَنْ لُحُومِ الْحُمُرِ الأَهْلِيَّةِ يَوْمَ خَيْبَرَ.
Narrated Ibn `Umar:The Prophet (ﷺ) made the meat of donkeys unlawful on the day of the battle of Khaibar
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: 72:47