[Machine] The Prophet of Allah ﷺ used to say, "When he bowed down in prayer, he would remain still so that even if water was poured on his back, it would stay there."
كَانَ رَسُولُ اللهِ ﷺ «إِذَا رَكَعَ اسْتَوَى فَلَوْ صُبَّ عَلَى ظَهْرِهِ الْمَاءُ لَاسْتَقَرَّ»