Sahih al-Bukhari 3999
صحيح البخاري#3999SahihNarrated 'Ubada bin As-Samit:(who was one of the Badr warriors) Allah's Messenger (ﷺ) said, "Give me the pledge of allegiance
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: 64:50