Anas b. Malik reported that Allah's Apostle (ﷺ) used to come to our house and there was perspiration upon his body. My mother brought a bottle and began to pour the sweat in that. When Allah's Apostle (ﷺ) got up he said
Umm Sulaim, what is this that you are doing? Thereupon she said: That is your sweat which we mix in our perfume and it becomes the most fragrant perfume.
Anas b. Malik reported that Allah's Apostle (ﷺ) came to the house of Umm Sulaim and slept in her bed while she was away from her house. On the other day too he slept in her bed. She came and it was said to her
It is Allah's Apostle (ﷺ) who is having siesta in your house, lying in your bed. She came and found him sweating and his sweat falling on the leather cloth spread on her bed. She opened her scent-bag and began to fill the bottles with it. Allah's Apostle (ﷺ) was startled and woke up and said: Umm Sulaim, what are you doing? She said: Allah's Messenger, we seek blessings for our children through it. Thereupon he said: You have done something right.
Umm Sulaim reported that Allah's Apostle (ﷺ) visited her house and (took rest) and she spread a piece of cloth for him and he had had a siesta on it. And he sweated profusely and she collected his sweat and put it in a perfume and in bottles. Allah's Apostle (ﷺ) said
Umm Sulaim, what is this? She said: It is your sweat, which I put in my perfume. Allah's Apostle (ﷺ) sweated in cold weather when revelation descended upon him.