'O God' in the Bible

'O Lord Jehovah, thou hast begun to show thy servant thy greatness and thy mighty hand, for there is no God in heaven nor in earth that can do after thy works and after thy power:

They offered unto field-devils and not to God; and to gods which they knew not; and to new gods that came newly up, which their fathers feared not.

They have angered me with that which is no god; and provoked me with their vanities. And I, again, will anger them with them which are no people, and will provoke them with a foolish nation.

"'See, now, how that I - I am he: and that there is no God but I. I can kill, and make alive; and what I have smitten, that I can heal. Neither is there that can deliver any man out of my hand.