Anas ibn Malik related that the Prophet (SAW) lay down on a leather mat and sweated; Umm Sulaim got up as He was sweating, wiped it, and put it in a bottle. And the Prophet (SAW) saw her and said: What is this you are doing, oh Umm Sulaim? She said: I am putting your sweat in my perfume. And the Prophet (SAW) laughed.