From Sahih Muslim (Hadith 6055):
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
Reference: Muslim 6055