The Book Pertaining to the Excellent Qualities of the Holy Prophet (may Peace be upon them) and His Companions (Kitab Al-Fada'il)
Muslim :: Book 30 : Hadith 5762
Anas b. Malik reported that Allah's Apostle (may peace be upon him) 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 (may peace be upon him) 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 (may peace be upon him) 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.