Musnad Ahmad 32:456

Hashim ibn al-Qasim narrated to us, Sulayman narrated to us, from Thabit, from Anas ibn Malik, who said: The Prophet, peace and blessings of Allah be upon him, entered upon us and took a nap at our place. He perspired, and my mother came with a bottle and began to wipe up the sweat into it. The Prophet, peace and blessings of Allah be upon him, woke up and said: "O Umm Sulaym, what is this that you are doing?" She said: "This is your sweat; we put it into our perfume, and it is of the most fragrant of perfumes."