Hazrat Anas bin Malik (may Allah be pleased with him) narrated that the Prophet Muhammad (peace and blessings be upon him) would not visit anyone's house in Madinah except his wives, except that he would go to Umm Sulaym's house. When he was asked about this, he replied, "I feel compassion for her; her brother (Haram bin Milhan, may Allah be pleased with him) was martyred in my cause."