It is narrated from Abu Hurairah (may Allah be pleased with him) that he said: When the Messenger of Allah (ﷺ) would bow in rukū‘, he would recite: "O Allah! I have bowed for You, and I have submitted to You, and I have believed in You, and You alone are my Lord. My ears, my eyes, my bones, my hair, my skin, and (this body) which my feet have lifted, have all humbled themselves before Allah, the Lord of all the worlds."
Hadith Referenceمسند الإمام الشافعي / كتاب الصلاة / 226
Hadith Takhrijاسنادہ ضعیف لشدة ضعف شیخ الشافعی، لیکن الحديث صحيح من حديث علی كما سيأتی أخرجہ البیہقی فی المعرفة السنن والآثار (801)
It is narrated from Ali (may Allah be pleased with him) that when the Prophet (ﷺ) would bow (in rukū‘), he would recite: "O Allah! I have bowed for You, and I have believed in You, and I have submitted to You, and You alone are my Lord. My ears, my eyes, my mind, my bones, and my body—whatever my feet have carried—have humbled themselves for You, for Allah, the Lord of all the worlds."
Hadith Referenceمسند الإمام الشافعي / كتاب الصلاة / 227
Hadith Takhrijأخرجہ مسلم، الصلوة، باب صلاة النبي ﷺ ودعائه باللیل : (771)
It is narrated from Ali (may Allah be pleased with him) that he said: "When you bow (in ruku‘), recite: 'O Allah! I have bowed for You, and I have humbled myself for You, and I have submitted to Your obedience, and I have believed in You, and I have placed my trust in You, so my bowing is complete for You.'"
Hadith Referenceمسند الإمام الشافعي / كتاب الصلاة / 228
Hadith Takhrijاسنادہ حسن فان عاصم بن ضمرة السلولی الکوفی صدوق حسن الحدیث اخرجہ عبد الرزاق: 2902 - وابن ابی شیبة: (2563)