Sahih al-Bukhari 5521
صحيح البخاري#5521SahihNarrated Ibn `Umar:The Prophet (ﷺ) made the meat of donkeys unlawful on the day of the battle of Khaibar
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Every narration in Sahih al-Bukhari is accepted as Sahih (authentic) by the established status of the book.
In-book reference: 72:47