It is narrated from Hazrat Aisha (may Allah be pleased with her) that sometimes when the Prophet (peace and blessings be upon him) would wake up at night to pray, one corner of the blanket would be over the Prophet (peace and blessings be upon him) and the other corner would be over Aisha, "who would be in her menstrual period," and the Prophet (peace and blessings be upon him) would continue to pray.