'O God' in the Bible

And it came to pass in the course of those many days, that the king of Egypt died: and the children of Israel sighed by reason of the bondage, and they cried, and their cry came up unto God by reason of the bondage.

And Moses said unto God, Who am I, that I should go unto Pharaoh, and that I should bring forth the children of Israel out of Egypt?

And Moses said unto God, Behold, when I come unto the children of Israel, and shall say unto them, The God of your fathers hath sent me unto you; and they shall say to me, What is his name? What shall I say unto them?

Hearken now unto my voice, I will give thee counsel, and God be with thee: be thou for the people to God-ward, and bring thou the causes unto God:

And Moses went up unto God, and Jehovah called unto him out of the mountain, saying, Thus shalt thou say to the house of Jacob, and tell the children of Israel:

then his master shall bring him unto God, and shall bring him to the door, or unto the door-post; and his master shall bore his ear through with an awl; and he shall serve him for ever.

If the thief be not found, then the master of the house shall come near unto God, to see whether he have not put his hand unto his neighbor's goods.