Musannaf Ibn Abi Shayba 13:1940

Abu Bakr narrated to us, he said: Waki’ narrated to us, he said: Shu’bah narrated to us, he said: I asked al-Hakam and Hammad about the foundling (al-laqit), and they both said: "He is free." Shu’bah said: So I said to al-Hakam, "From whom?" He said: "From al-Hasan al-Basri, from Ali."