It is narrated from Sayyiduna Abu Sa'id Khudri (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) used to say after bowing (ruku):
"O Allah! Our Lord! To You belongs all praise, as much as fills the heavens, as much as fills the earth, and as much as fills whatever else You will after that. O Possessor of praise and glory! You are most deserving of what the servant says, and all of us are Your servants. There is none who can withhold what You give, and no one of might can benefit from his might against You."
Hadith Referenceالفتح الربانی / أبواب صفة الصلاة / 1715
Hadith Gradingمحدثین:صحیح
Hadith Takhrij«أخرجه مسلم: 477 ، (انظر مسند أحمد ترقيم الرسالة: 11828 ترقیم بيت الأفكار الدولية: 11850»
Brief Explanation
Benefits: … Generally, people consider saying "Rabbana lakal hamd" during the standing (qawmah) after bowing (ruku) to be sufficient, and this has been their routine for a long time. It seems as if this is a sign of lack of enthusiasm, because the Prophet sallallahu alayhi wa sallam praised and glorified Allah in such an excellent manner at this occasion, yet our own selves do not incline us to do the same.