Mu'jam Kabir Tabarani 16564 — when the Messenger of Allah ﷺ stood up

It is narrated from Sayyiduna Muhammad bin Maslamah (may Allah be pleased with him) that when the Messenger of Allah (peace and blessings be upon him) stood up to pray, he would say: "Allahu Akbar (Allah is the Greatest). I have turned my face towards the One who created the heavens and the earth, in pure devotion, as a Muslim, and I am not one of the polytheists. Indeed, my prayer, my sacrifice, my living and my dying are all for Allah, Lord of the worlds, who has no partner; with this I have been commanded, and I am the first of those who submit. O Allah, You are the King; there is no god but You; You are free of all imperfection, and to You belongs all praise." Then he would recite, and when he bowed he would say: "O Allah, for You I have bowed, in You I have believed, to You I have submitted, and in You I have put my trust. You are my Lord. My hearing, my sight, my flesh, my blood and my brain have all bowed to Allah, Lord of the worlds." Then he would raise his head and say: "Sami'a Allahu liman hamidah (Allah hears the one who praises Him). Our Lord, to You belongs all praise, filling the heavens and filling the earth, and filling whatever else You will thereafter." And when he prostrated he would say: "O Allah, for You I have prostrated, in You I have believed, and to You I have submitted. You are my Lord. My face has prostrated to the One who created it, gave it its form, and opened its hearing and sight. Blessed is Allah, the best of creators."