Sahih al-Bukhari 963
صحيح البخاري#963SahihNarrated Ibn `Umar:Allah's Messenger (ﷺ), Abu Bakr and `Umar! used to offer the two `Id prayers before delivering the Khutba
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: 13:12