Sayyiduna Ali bin Abi Talib (may Allah be pleased with him) narrates: When the Prophet Muhammad (peace and blessings be upon him) would go into prostration during the obligatory prayer, he would recite this: "O Allah! I have prostrated for You, and I have believed in You. I have submitted to You, for You are my Lord. My face is in prostration before the One who created it, who granted it hearing and sight. So blessed is Allah, the Best of creators."