It is narrated from Hazrat Anas (may Allah be pleased with him) that once the Prophet (peace and blessings be upon him) came to our house and lay down for a siesta. Due to the heat, the Prophet (peace and blessings be upon him) began to sweat. My mother, seeing this, brought a bottle and started collecting his sweat in it. When the Prophet (peace and blessings be upon him) woke up, he asked, "Umm Sulaym! What are you doing?" She replied, "We will mix your sweat into our perfume, and it will be the best fragrance of all."