Sahih al-Bukhari 982
صحيح البخاري#982SahihNarrated Ibn `Umar:The Prophet (ﷺ) used to Nahr or slaughter sacrifices at the Musalla (on `Id-ul-Adha)
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: 13:31