'O God' in the Bible

I am thankful to God that I baptized none of you except Crispus and Gaius,

For the unbelieving husband is consecrated through union with his believing wife; and the unbelieving wife, through union with her believing husband. Otherwise your children would be unholy, but now they are consecrated to God.

Where each man stood when he was called, there, brothers, let him stay, close to God.

Now as to eating food that has been offered to idols, we know well that an idol has no real existence in the universe, and that there is no God but One.

Now food does not bring us nearness to God. Neither if we eat do we gain any advantage, nor if we eat not, do we lose any.

On the contrary, what the heathen sacrifice they sacrifice to demons and not to God, and I do not want you to have communion with demons.

Judge of this for your own selves. It is fitting that a woman should pray to God with her head unveiled.

For he who speaks in a "tongue" speaks not to man but to God, for no one understands him, but in the Spirit he utters secret truths.

But if there is no one to interpret, let them keep silence in the church, and speak to themselves and to God.

And then the end, when he shall hand over his kingdom to God his Father, after he has abolished all rule and authority and power.

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