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.
حَدَّثَنَا مُحَمَّدُ بْنُ سِنَانٍ، قَالَ حَدَّثَنَا فُلَيْحٌ، قَالَ حَدَّثَنَا هِلاَلُ بْنُ عَلِيٍّ، عَنْ أَنَسِ بْنِ مَالِكٍ، قَالَ صَلَّى لَنَا النَّبِيُّ صلى الله عليه وسلم ثُمَّ رَقَا الْمِنْبَرَ، فَأَشَارَ بِيَدَيْهِ قِبَلَ قِبْلَةِ الْمَسْجِدِ ثُمَّ قَالَ " لَقَدْ رَأَيْتُ الآنَ مُنْذُ صَلَّيْتُ لَكُمُ الصَّلاَةَ الْجَنَّةَ وَالنَّارَ مُمَثَّلَتَيْنِ فِي قِبْلَةِ هَذَا الْجِدَارِ، فَلَمْ أَرَ كَالْيَوْمِ فِي الْخَيْرِ وَالشَّرِّ " ثَلاَثًا.
Bukhari
Call to Prayers (Adhaan) • Hadith 143