Messenger of Allah ﷺ said, "You see me facing the Qibla; but, by Allah, nothing is hidden from me regarding your bowing and submissiveness and I see you from behind my back."
أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ هَلْ تَرَوْنَ قِبْلَتِي هَا هُنَا وَاللَّهِ مَا يَخْفَى عَلَىَّ رُكُوعُكُمْ وَلاَ خُشُوعُكُمْ وَإِنِّي لأَرَاكُمْ وَرَاءَ ظَهْرِي