Sahih Bukhari
Sahih Bukhari Volume 001, Book 008, Hadith Number 431.
Hadith Section/Book: Sahih Bukhari Sahih Bukhari Book 08. Prayers (Salat)
Narated By Naf'a : 'Abdullah bin 'Umar said: I used to sleep in the mosque of the Prophet while I was young and unmarried.