The Prophet ﷺ, when he bowed in prayer, would say, "O Allah, to You I have bowed, in You I have believed, to You I have submitted, and upon You I have relied. You are my Lord. My hearing, my sight, my blood, my flesh, my bones, and my sinews are humbled before Allah, Lord of the worlds."
عن النبي ﷺ كان إذا ركع قال: اللهم لك ركعت، وبك آمنت، ولك أسلمت، وعليك توكلت، أنت ربي، خشع سمعي وبصري ودمي ولحمي وعظمي وعصبي الله رب العالمين.
Nasai (1051) narrated it from Yahya bin Uthman Hadrami, who said, Abu Haywa narrated to us, who said, Shuayb narrated to us, from Muhammad bin Munkadir, from Jabir, and he related it. Its chain of transmission is sahih.Abu Haywa is Shurayh bin Yazid Hadrami, the Homsi. A large number of people narrated from him, including leading scholars and memorizers of hadith, which indicates his renown. No criticism of him is known, and for this reason Dhahabi said in Al-Kashif, "Trustworthy," and likewise Ibn Hajar said in Al-Taqrib, as found in some of its manuscripts.