(46) باب مَقْدَمِ النَّبِيِّ صلى الله عليه وسلم وَأَصْحَابِهِ الْمَدِينَةَ
Narrated Al-Bara:
The first people who came to us (in Medina) were Mus`ab bin `Umar and Ibn Um Maktum. Then came to us `Ammar bin Yasir and Bilal.
Reference: Sahih al-Bukhari 3924
In-book reference: Book 63, Hadith 150
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 5, Book 58, Hadith 261