(91) باب رَفْعِ الْبَصَرِ إِلَى الإِمَامِ فِي الصَّلاَةِ
Narrated Anas bin Malik:
The Prophet (ﷺ) led us in prayer and then went up to the pulpit and beckoned with both hands towards the Qibla of the mosque and then said, "When I started leading you in prayer, I saw the display of Paradise and Hell on the wall of the mosque (facing the Qibla). I never saw good and bad as I have seen today." He repeated the last statement thrice.
Reference: Sahih al-Bukhari 749
In-book reference: Book 10, Hadith 143
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 1, Book 12, Hadith 716