Sayyiduna Anas (may Allah be pleased with him) narrates: Once, Sayyiduna Bilal (may Allah be pleased with him) gave the adhan before true dawn. So the Noble Prophet (peace and blessings be upon him) instructed him: Go back and announce: "Indeed, the servant had fallen asleep." So he did so and said: "If only Bilal's mother had not given birth to him." And his forehead became covered with sweat. In narrating this report, the narrator named Abu Yusuf is unique. Other narrators have transmitted it as a mursal narration, which is reported from Qatadah.