Musannaf Ibn Abi Shaybah 39353 — The acceptance of Islam by Abu Bakr

It is narrated from Sayyiduna Abdullah (may Allah be pleased with him) that the first who made their Islam public were seven persons: the Messenger of Allah (peace and blessings be upon him), Sayyiduna Abu Bakr, Sayyiduna Ammar, his mother Sayyidah Sumayyah, Sayyiduna Bilal, Sayyiduna Suhayb and Sayyiduna al-Miqdad (may Allah be pleased with them). As for the Messenger of Allah (peace and blessings be upon him), Allah Almighty protected him (from the polytheists) through his uncle Abu Talib; and Allah Almighty protected Sayyiduna Abu Bakr (from the polytheists) through his people. As for the rest, the polytheists seized them, made them wear coats of iron mail and left them to burn in the sun. There was not one of them, except Sayyiduna Bilal, who did not go along with what the polytheists wanted. Sayyiduna Bilal's own life became of little worth to him for the sake of Allah, and he was also of little worth to his people. So the polytheists handed Sayyiduna Bilal over to the children, and they began to parade him around the valleys, while Sayyiduna Bilal kept saying: Ahad, Ahad (One, One).