Sahih al-Bukhari 711
صحيح البخاري#711SahihNarrated Jabir bin `Abdullah:Mu`adh used to pray with the Prophet (ﷺ) and then go and lead his people (tribe) in the prayer
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: 10:106