It is narrated from Sayyiduna Sa’ib bin Yazid, he says: For all prayers including Jumu’ah, the Messenger of Allah (peace and blessings be upon him) had one muezzin; he would give the adhan and also say the iqamah. When the Messenger of Allah (peace and blessings be upon him) would sit on the pulpit on the day of Jumu’ah, then Sayyiduna Bilal (may Allah be pleased with him) would give the adhan, and when he would descend, then he would say the iqamah. Sayyiduna Abu Bakr and Sayyiduna Umar (may Allah be pleased with them) also had (only one muezzin), until the era of Sayyiduna Uthman (may Allah be pleased with him) arrived.