'O God' in the Bible

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

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

No: but this I say, that what the Gentiles sacrifice, they sacrifice to demons, and not to God.

Judge in 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, though in spirit he speaketh mysteries.

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

Then will be 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, who giveth us the victory through our Lord Jesus Christ.