Sahih Bukhari
4941
Narrated Al-Bara: The first of the companions of the Prophet who came to us (in Medina), were Mus`ab bin `Umar and Ibn Um Maktum, and they started teaching us the Qur'an. Then came `Ammar, Bilal and Sa`d. Afterwards `Umar bin Al-Kkattab came along..
READ COMPLETE