Sahih al-Bukhari 467
صحيح البخاري#467SahihNarrated Ibn `Abbas:"Allah's Messenger (ﷺ) in his fatal illness came out with a piece of cloth tied round his head and sat on the pulpit. After thanking and praising Allah he said, "There is no one who had done more favor to me with life and property than Abu Bakr bin Abi Quhafa. If I were to take a Khalil, I would certainly have taken Abu- Bakr but the Islamic brotherhood is superior. Close all the small doors in this mosque except that of Abu Bakr
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: 8:115