'O God' in the Bible

Therefore concerning the eating of things sacrificed to idols, we know that no idol is anything in the world, and that there is no God but one.

But food will not commend us to God. For neither, if we do not eat, are we the worse; nor, if we eat, are we the better.

But I say that the things which the Gentiles sacrifice, they sacrifice to demons, and not to God, and I do not desire that you would have fellowship with demons.

Judge for yourselves. Is it appropriate that a woman pray to God unveiled?

But if any man seems to be contentious, we have no such custom, neither do God's churches.

For he who speaks in another language speaks not to men, but to God; for no one understands; but in the Spirit he speaks mysteries.

But if there is no interpreter, let him keep silent in the church, and let him speak to himself, and to God.

Then the end comes, when he will deliver up the Kingdom to God, even the Father; when he will have abolished all rule and all authority and power.

But thanks be to God, who gives us the victory through our Lord Jesus Christ.