'O God' in the Bible

So God treated the midwives well, and the people multiplied and became very strong.

During that long period of time the king of Egypt died, and the Israelites groaned because of the slave labor. They cried out, and their desperate cry because of their slave labor went up to God.

Moses said to God, "Who am I, that I should go to Pharaoh, or that I should bring the Israelites out of Egypt?"

Moses said to God, "If I go to the Israelites and tell them, 'The God of your fathers has sent me to you,' and they ask me, 'What is his name?' -- what should I say to them?"

So God brought the people around by the way of the desert to the Red Sea, and the Israelites went up from the land of Egypt prepared for battle.

Now listen to me, I will give you advice, and may God be with you: You be a representative for the people to God, and you bring their disputes to God;

Moses went up to God, and the Lord called to him from the mountain, "Thus you will tell the house of Jacob, and declare to the people of Israel: