'O God' in the Bible

we know that an idol is nothing in the world, and that there is no God but one.

But meat commendeth us not to God; for neither if we eat, are we the better, nor if we eat not, are we the worse.

To them that are without the law, as without the law, (being not without the law to God, but under the law to Christ) that I might gain them that are without the law.

But that what the heathens sacrifice, they sacrifice to devils, and not to God. Now I would not that ye should be partakers with devils.

Judge of yourselves: is it decent for a woman to pray to God uncovered?

For he that speaketh in an unknown tongue, speaketh not to men, but to God; for no one understandeth him, though by the Spirit he speaketh mysteries:

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

Then cometh the end, when he shall have delivered up the kingdom to God, even the Father, when he shall have abolished all rule and all authority and power.

But thanks be to God,