'O God' in the Bible

And Abraham said unto God, "O that Ishmael might live in thy sight!"

And so Abraham prayed unto God, and God healed Abimelech and his wife and his maidens, so that they bare.

And Jacob said, "O God of my father Abraham, and God of my father Isaac: LORD, which saidest unto me, 'return unto thy country and to thy kindred, and I will deal well with thee.'

And God said unto Jacob, "Arise and get thee up to Bethel, and dwell there. And make there an altar unto God that appeared unto thee, when thou fleddest from Esau thy brother."

and let us arise and go up to Bethel, that I may make an altar there, unto God which heard me in the day of my tribulation and was with me in the way which I went."

They answered him, "We have dreamed a dream, and have no man to declare it." And Joseph said unto them, "Interpreting belongeth to God, but tell me yet."