Sahih al-Bukhari 3924
صحيح البخاري#3924SahihNarrated Al-Bara:The first people who came to us (in Medina) were Mus`ab bin `Umair and Ibn Um Maktum. Then came to us `Ammar bin Yasir and Bilal
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: 63:149