Narrated by Sayyida Aisha (may Allah be pleased with her): The Prophet (peace and blessings of Allah be upon him) came (home) and there was a man sitting with me (who was the foster brother of Sayyida Aisha, may Allah be pleased with her). He asked, "Aisha, who is this?" I replied, "He is my foster brother." The Prophet (peace be upon him) said, "Aisha, be careful and make sure who your foster brother is, for suckling is only valid in childhood."