Sahih al-Bukhari 874
صحيح البخاري#874SahihNarrated Anas:The Prophet (ﷺ) prayed in the house of Um Sulaim; and I, along with an orphan stood behind him while Um Sulaim (stood) behind us
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: 10:265