Sahih Bukhari Volume 001, Book 009, Hadith Number 491.
Hadith Section/Book: Sahih Bukhari Sahih Bukhari Book 09. Virtues Of The Prayer Hall (Sutra Of The Musalla)
Narated By 'Aisha : The Prophet used to pray while I was sleeping across in his bed in front of him. Whenever he wanted to pray Witr, he would wake me up and I would pray Witr.