It was narrated that As-Sa'ib bin Yazid said:"Bilal used to call the Adhan when the Messenger of Allah (ﷺ) sat on the Minbar on Friday, and when he came down he would say the Iqamah. It continued like that during the time of Abu Bakr and 'Umar, may Allah (SWT) be pleased with them

English translation · Sunan an-Nasa'i