Sahih Bukhari
Sahih Bukhari Volume 001, Book 012, Hadith Number 830.
Hadith Section/Book: Sahih Bukhari Sahih Bukhari Book 12. Charecteristics Of Prayer
Narated By Anas : The Prophet prayed in the house of Um Sulaim; and I, along with an orphan stood behind him while Um Sulaim (stood) behind us.