'O God' in the Bible

And Ado'ni-be'zek said, "Seventy kings with their thumbs and their great toes cut off used to pick up scraps under my table; as I have done, so God has requited me." And they brought him to Jerusalem, and he died there.

Then Gideon said to God, "If thou wilt deliver Israel by my hand, as thou hast said,

Then Gideon said to God, "Let not thy anger burn against me, let me speak but this once; pray, let me make trial only this once with the fleece; pray, let it be dry only on the fleece, and on all the ground let there be dew."

for lo, you shall conceive and bear a son. No razor shall come upon his head, for the boy shall be a Nazirite to God from birth; and he shall begin to deliver Israel from the hand of the Philistines."

but he said to me, 'Behold, you shall conceive and bear a son; so then drink no wine or strong drink, and eat nothing unclean, for the boy shall be a Nazirite to God from birth to the day of his death.'"

And he told her all his mind, and said to her, "A razor has never come upon my head; for I have been a Nazirite to God from my mother's womb. If I be shaved, then my strength will leave me, and I shall become weak, and be like any other man."

Then Samson called to the LORD and said, "O Lord GOD, remember me, I pray thee, and strengthen me, I pray thee, only this once, O God, that I may be avenged upon the Philistines for one of my two eyes."