'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 sons of Israel sighed because of the bondage, and they cried, and their cry came up to God because of the bondage.

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

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

Hearken now to my voice. I will give thee counsel, and God be with thee. Be thou for the people toward God, and bring thou the cases to God.

And Moses went up to God. And LORD called to him out of the mountain, saying, Thus thou shall say to the house of Jacob, and tell the sons of Israel:

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

If the thief is not found, then the master of the house shall come near to God, [to see] whether he has not put his hand to his neighbor's goods.