Musannaf Ibn Abi Shayba 13:3024

Abu Bakr narrated to us, he said: Waki’ narrated to us, he said: Furat ibn Abi Bahr narrated to us, he said: I heard al-Sha’bi, and a man said to him, "Judge between us by what God has shown you." He said, "I do not judge by my own opinion."