Hazrat Bilal (Radhiallahu Anhu) was the first muazen of Islam. He was a black, and was amongst the most trusted friend of Hazrat Muhammad (P.BU.H).Hazrat Bilal's patience, forbearance, and faith in God made him one of the closest companions of Hazrat Muhammad (P.BU.H). He was amongst the first few people who embraced Islam.