It was narrated from 'Aishah that:
The Messenger of Allah would become sexually impure then sleep as he was, without touching water. (Da'if)Sufyan said: "I mentioned this Hadith one day, and Isma'il said to me: 'O young man, you should support this Hadith with something else.'"
English reference: Vol. 1, Book 1, Hadith 583
Arabic reference: Book 1, Hadith 626