Musannaf Ibn Abi Shaybah 18243 — Milk attributed to the husband

Amr bin al-Sharid (may Allah have mercy on him) said: Sayyiduna Ibn Abbas (may Allah be pleased with them both) was asked: If a man has a wife and a slave woman, and one of them gives birth to a boy and the other nurses a girl, is it permissible for that boy to marry the girl who was nursed? He said: No, because the cause of the milk flowing in both of them is one man.