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 bowing (ruku‘), he would recite: "O Allah! For You I have bowed, in You I have believed, for You I have submitted. You are my Lord. My hearing, my sight, my marrow, my bones, my tendons, and whatever my two feet support (that is, my entire being) is humbled before Allah, the Lord of all the worlds."