Volume 9, Book 89, Number 287:
Narrated Ibn ‘Umar:
Salim, the freed salve of Abu Hudhaifa used to lead in prayer the early Muhajirin (emigrants) and
the companions of the Prophet in the Quba mosque. Among those (who used to pray behind him)
were Abu Bakr, ‘Umar, Abu Salama, and Amir bin Rabi’a.