(40) باب عِظَةِ الإِمَامِ النَّاسَ فِي إِتْمَامِ الصَّلاَةِ، وَذِكْرِ الْقِبْلَةِ
Narrated Abu Huraira:
Allah's Messenger (ﷺ) 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."
Reference: Sahih al-Bukhari 418
In-book reference: Book 8, Hadith 68
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 1, Book 8, Hadith 410