Volume 7, Book 62, Number 39:
Narrated ‘Aisha:
that the Prophet entered upon her while a man was sitting with her. Signs of anger seemed to ap –
pear on his face as if he disliked that. She said, “Here is my (foster) brother.” He said, “Be sure as to
who is your foster brother, for foster suckling relationship is established only when milk is the only
food of the child.”