Sahih Bukhari
Sahih Bukhari Volume 001, Book 008, Hadith Number 410.
Hadith Section/Book: Sahih Bukhari Sahih Bukhari Book 08. Prayers (Salat)
Narated By Abu Huraira : Allah's Apostle said, "Do you consider or see that my face is towards the Qibla? By Allah, neither your submissiveness nor your bowing is hidden from me, surely I see you from my back."