'O God' in the Bible

But food will not recommend us to God; if we do not eat, we are not the worse; nor if we do eat, are we the better.

Nay, but that what they sacrifice, they sacrifice to demons, and not to God; and I would not that ye should have communion with demons.

Judge in your own selves; is it comely that a woman pray to God uncovered?

For he that speaketh in an [unknown] tongue speaketh not to men, but to God; for no one heareth; but in the Spirit he speaketh mysteries;

But if there be no interpreter, let him keep silence in the church; and let him speak to himself, and to God.

Then will be the end, when he delivereth up the kingdom to God, the Father, when he shall have destroyed all dominion, and all authority, and power.

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