Musnad Abu Ya'la al-Mawsili 109:268

Kamil narrated to us, Layth narrated to us, he said: Abu al-Zubayr narrated to me, from Jabir ibn Abdullah, that Umm Salamah sought permission from the Messenger of Allah (may Allah bless him and grant him peace) for cupping, so he ordered Abu Taybah, and he cupped her. Abu Ya'la said: I think he said, "He was her foster brother."