Sahih al-Bukhari 3670
صحيح البخاري#3670SahihAisha said (in another narration), ("When the Prophet (ﷺ) was on his death-bed) he looked up and said thrice, (Amongst) the Highest Companion (See Qur'an 4.69)' Aisha said, Allah benefited the people by their two speeches. 'Umar frightened the people some of whom were hypocrites whom Allah caused to abandon Islam because of 'Umar's speech. Then Abu Bakr led the people to True Guidance and acquainted them with the right path they were to follow so that they went out reciting:-- "Muhammad is no more than an Apostle and indeed many Apostles have passed away before him
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: 62:20