It is narrated from Hazrat Anas (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) used to come to the house of Hazrat Umm Sulaym (may Allah be pleased with her) and sleep on her bed, and she would not be there. One day, as usual, the Prophet (peace and blessings be upon him) came and slept on her bed. Someone went and told her that the Prophet (peace and blessings be upon him) is sleeping in your house on your bed. So she came home and saw that the Prophet (peace and blessings be upon him) was drenched in sweat, and that sweat was falling onto a piece of leather spread on the bed. She opened her scarf and began to soak up the sweat with it and squeeze it into a bottle. The Prophet (peace and blessings be upon him) woke up startled and said, "Umm Sulaym! What are you doing?" She replied, "O Messenger of Allah (peace and blessings be upon him)! We hope for blessings for our children from this." The Prophet (peace and blessings be upon him) said, "You have done right."