Musnad Ahmad 1153:1400

Muhammad ibn Ja’far and Bahz narrated to us, they said: Shu’bah narrated to us. Bahz said: Ash’ath ibn Sulaym narrated to us that he heard his father narrating. And Muhammad ibn Ja’far said: From Ash’ath ibn Sulaym, from his father, from Masruq, from ‘Aishah, that the Messenger of Allah (peace and blessings of Allah be upon him) entered upon her while a man was with her, and it was as if he became angry. She said: "He is my brother." He said: "Look at who your brothers are, for indeed, suckling is only from hunger."