Posted on 06/28/2012 by __socrates

The caller at the azan, or “summons to prayer.” In small mosques, the azan is given by the Imam, but in the larger ones, an official is specially appointed for the purpose. When the mosque has a minaret, he calls from the top of it, but in smaller places of worship, from the aide of the mosque. The first mu’azzin was Bilal, the son of an Abyssinian slave-girl, and Muhammad is related to have said, “The callers to prayer may expect Paradise, and whoever serves in the office for seven years shall be saved from hell fire,’ (Mishkat, book iv., ch. vi.) [AZAN.]

Based on Hughes, Dictionary of Islam