'O God' in the Bible

So God created man in his own image, in the image of God created he him; male and female created he them.

And Abraham said unto God, O that Ishmael might live before thee!

So Abraham prayed unto God: and God healed Abimelech, and his wife, and his maidservants; and they bare children.

And Jacob said, O God of my father Abraham, and God of my father Isaac, the LORD which saidst unto me, Return unto thy country, and to thy kindred, and I will deal well with thee:

And God said unto Jacob, Arise, go up to Bethel, and dwell there: and make there an altar unto God, that appeared unto thee when thou fleddest from the face of Esau thy brother.

And let us arise, and go up to Bethel; and I will make there an altar unto God, who answered me in the day of my distress, and was with me in the way which I went.

And they said unto him, We have dreamed a dream, and there is no interpreter of it. And Joseph said unto them, Do not interpretations belong to God? tell me them, I pray you.