Sahih Bukhari
Sahih Bukhari Volume 001, Book 008, Hadith Number 411.
Hadith Section/Book: Sahih Bukhari Sahih Bukhari Book 08. Prayers (Salat)
Narated By Anas bin Malik : The Prophet led us in a prayer and then got up on the pulpit and said, "In your prayer and bowing, I certainly see you from my back as I see you (while looking at you.)"