Sahih al-Bukhari 7175
صحيح البخاري#7175SahihNarrated Ibn `Umar:Salim, the freed salve of Abu Hudhaifa used to lead in prayer the early Muhajirin (emigrants) and the companions of the Prophet (ﷺ) in the Quba mosque. Among those (who used to pray behind him) were Abu Bakr, `Umar, Abu Salama, and Amir bin Rabi`a
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: 93:39