King David's prayer of thanksgiving to God...

“But who am I, and who are my people, that we could give anything to you? Everything we have has come from you, and we give you only what you first gave us!” 

1 Chronicles 29:14 (NLT) 

“But who am I, and what is my people, that we should be able to offer so willingly after this sort? for all things come of thee, and of thine own have we given thee.” 

1 Chronicles 29:14 (KJV)