Acceptance of Islam
According to one narration, Hazrat Mu‘az (ra) bin Harith and Hazrat Rafay (ra) bin Malik Zuraqiyy were among the foremost Ansar who accepted the Holy Prophet(sa) in Mecca. Hazrat Mu‘az (ra) was among those eight Ansar who accepted the Holy Prophet (sa) at the occasion of the First Pledge at Aqabah in Mecca. Likewise, Hazrat Mu‘az (ra) was also present during the Second Pledge at Aqabah. When Hazrat Ma‘mar bin Harith (ra) migrated from Mecca to Medina, the Holy Prophet (sa) established a bond of brotherhood between him and Hazrat Mu‘az bin Harith (ra).
(Usdul Ghabah, Vol. 5, pp. 190-191, Mu‘az bin al-Harith bin Rifa‘ah (ra), Dar-ul-Kutub al-Ilmiyyah, Beirut, 2003) (Al-Tabaqaat-ul-Kubra li ibn Sa‘d, Vol. 3, p. 374, Mu‘az bin al-Harith (ra), Dar-ul-Kutub al-Ilmiyyah, Beirut, 1990)