'O God' in the Bible

And Adonibezek said, Threescore and ten kings, having their thumbs and their great toes cut off, gathered scraps under my table: as I have done, so God has requited me. And they brought him to Jerusalem, and there he died.

So God subdued on that day Jabin the king of Canaan before the children of Israel.

And Gideon said unto God, If you will save Israel by my hand, as you have said,

And Gideon said unto God, Let not your anger be hot against me, and I will speak but this once: let me test, I pray you, but this once with the fleece; let it now be dry only upon the fleece, and upon all the ground let there be dew.

And would to God this people were under my hand! then would I remove Abimelech. And he said to Abimelech, Increase your army, and come out.

For, lo, you shall conceive, and bear a son; and no razor shall come upon his head: for the child shall be a Nazarite unto God from the womb: and he shall begin to deliver Israel out of the hand of the Philistines.

But he said unto me, Behold, you shall conceive, and bear a son; and now drink no wine nor strong drink, neither eat any unclean thing: for the child shall be a Nazarite to God from the womb to the day of his death.

That he told her all his heart, and said unto her, There has not come a razor upon my head; for I have been a Nazarite unto God from my mother's womb: if I be shaven, then my strength will go from me, and I shall become weak, and be like any other man.

And Samson called unto the LORD, and said, O Lord GOD, remember me, I pray you, and strengthen me, I pray you, only this once, O God, that I may be avenged of the Philistines for my two eyes.