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."