It is narrated from Sayyiduna Muhammad bin Maslamah (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) used to say in his prostration: "O Allah, for You I have prostrated, in You I have believed, to You I have submitted, and 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." 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 blood, my brain, my bones and my sinews have all humbly bowed to Allah, Lord of the worlds." Then, when he raised his head from bowing, he would 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."
Hadith Referenceالمعجم الكبير للطبراني / باب الميم / 16565