It was narrated from Ali bin Abi Talid that : When the Messenger of Allah (ﷺ) bowed, he said: Allahumma laka rak'atu was laka aslamtu wa bika amantu, khasha'a laka sa'i wa basri wa 'izami wa mukhi wa 'asabi ( O Allah, to You I have bowed and to You I have submitted and in You I have believed. My hearing, sight, bones, brain and sinews are humbled before You).