Musannaf Ibn Abi Shayba 3:1373

Hushaym narrated to us, he said: Husayn informed us, he said: I prayed beside Ubayd Allah ibn Abd Allah ibn Utbah. He said: So I heard him reciting behind the Imam. He said: Then I met Mujahid and mentioned that to him. Mujahid said: I heard Abd Allah ibn Amr reciting behind the Imam.