Sunan Ibn Majah
Establishing the Prayer and the Sunnah Regarding Them — Hadith #606
حَدَّثَنَا إِبْرَاهِيمُ بْنُ مُحَمَّدِ بْنِ يُوسُفَ الْفِرْيَابِيُّ، حَدَّثَنَا عَبْدُ اللَّهِ بْنُ عُثْمَانَ بْنِ عَطَاءٍ، حَدَّثَنَا طَلْحَةُ بْنُ زَيْدٍ، عَنْ رَاشِدٍ، قَالَ سَمِعْتُ وَابِصَةَ بْنَ مَعْبَدٍ، يَقُولُ رَأَيْتُ رَسُولَ اللَّهِ ـ صلى الله عليه وسلم ـ يُصَلِّي فَكَانَ إِذَا رَكَعَ سَوَّى ظَهْرَهُ حَتَّى لَوْ صُبَّ عَلَيْهِ الْمَاءُ لاَسْتَقَرَّ .
“I heard Wabisah bin Ma’bad saying: ‘I saw the Messenger of Allah (ﷺ) performing prayer, and when he bowed he made his back so straight that if water were poured on it, it would have stayed there.’”
Chain of Narration (Isnad)