What did the Prophet Muhammad (saw) say when he found out who was in `Aisha's house?
 Narrated Aisha:                     Once the Prophet came to me while a man was in my house. He said, "O `Aisha! Who is this (man)?" I replied, "My foster brothers" He said, "O `Aisha! Be sure about your foster brothers, as fostership is only valid if it takes place in the suckling period (before two years of age).