Musannaf Ibn Abi Shayba 3:1992

Muhammad ibn Bishr narrated to us, he said: Mis'ar narrated to us, he said: 'Utbah ibn Qays narrated to me, from Mujahid: That he used to recite the prostration (verse) in (Surah) Bani Isra'il and what follows it, then he would bow.