It is narrated from Hazrat Umm Sulaym (may Allah be pleased with her) that the Prophet (peace and blessings be upon him) used to come to her house and sleep on her bed, while she was not there. One day, as usual, the Prophet (peace and blessings be upon him) came and slept on her bed. When she came home, she saw that the Prophet (peace and blessings be upon him) was drenched in sweat. She absorbed that sweat with cotton and squeezed it into a bottle, mixing it with her perfume. She says that the Prophet (peace and blessings be upon him) used to pray on a mat.