Mukhtasar Muslim

Sayyiduna Anas bin Malik (may Allah be pleased with him) reports that the Prophet Muhammad (peace and blessings be upon him) would not enter the house of any woman except his wives or Umm Sulaym (who was the mother of Sayyiduna Anas and the wife of Sayyiduna Abu Talhah, may Allah be pleased with them). The Prophet (peace be upon him) used to visit Umm Sulaym. People asked about the reason for this, so the Prophet (peace be upon him) said: "I have great compassion for her; her brother was killed while fighting alongside me."