Musannaf Ibn Abi Shayba 9:1451

Ibn ‘Ulayyah narrated to us, from ‘Abbad ibn Mansur, who said: I asked al-Qasim ibn Muhammad: A woman said that she breastfed a girl from the people’s honor (lineage) with the milk of my brothers from my father; is she lawful for me? He said: Your father is her father. I asked Tawus, and he said the same. I asked al-Hasan, and he said the same. I asked Mujahid, and he said: The people have differed regarding it, and I do not say anything about it. I asked Ibn Sirin, and he said the same as what Mujahid said.