Prayers (Salat)
8/40. Chapter:
Preaching of the Imam to the people regarding the proper offering of As-Salat (the prayers) and the mention of the Qiblah (Kabah at Makkah)
Sahih Bukhari
حَدَّثَنَا يَحْيَى بْنُ صَالِحٍ، قَالَ حَدَّثَنَا فُلَيْحُ بْنُ سُلَيْمَانَ، عَنْ هِلاَلِ بْنِ عَلِيٍّ، عَنْ أَنَسِ بْنِ مَالِكٍ، قَالَ صَلَّى بِنَا النَّبِيُّ صلى الله عليه وسلم صَلاَةً ثُمَّ رَقِيَ الْمِنْبَرَ، فَقَالَ فِي الصَّلاَةِ وَفِي الرُّكُوعِ " إِنِّي لأَرَاكُمْ مِنْ وَرَائِي كَمَا أَرَاكُمْ ".
Narrated Anas bin Malik: The Prophet (ﷺ) 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.)"
Reference : Sahih al-Bukhari 419In-book reference : Book 8, Hadith 69USC-MSA web (English) reference : Vol. 1, Book 8, Hadith 411