question #3 Sahih Muslim 477, Book 4, Hadith 233 : What does it mean for a servant to acknowledge their servitude to Allah in their supplications?

When the Messenger of Allah (ﷺ) raised his head after bowing, he said: O Allah! our Lord, to Thee be the praise that would fill all the heavens and the earth, and all that it pleases Thee besides (them). O, thou art worthy of praise and glory, most worthy of what a servant says, and we all are Thy servants, no one can withhold what Thou givest or give what Thou withholdest, and riches cannot avail a wealthy person against Thee.