'O God' in the Bible

But of the Son he says, "Your throne, O God, is for ever and ever, and the righteous scepter is the scepter of your kingdom.

For every high priest chosen from among men is appointed to act on behalf of men in relation to God, to offer gifts and sacrifices for sins.

(for the law made nothing perfect); and on the other hand, a better hope is introduced, through which we draw near to God.

Therefore he is able also to save forever those who draw near to God through him, since he always lives to make intercession for them.

how much more will the blood of Christ, who through the eternal Spirit offered himself without blemish to God, cleanse your conscience from dead works to serve the living God?

Then I said, 'Behold, I have come to do your will, O God,' as it is written of me in the roll of the book."

and church of the firstborn who are enrolled in heaven, and to God, the Judge of all, and to the spirits of righteous men made perfect,

Therefore, since we are receiving a kingdom that cannot be shaken, let us be thankful, and offer to God acceptable worship with reverence and awe,

Through him then let us continually offer up a sacrifice of praise to God, that is, the fruit of lips that acknowledge his name.