'O God' in the Bible

but to the Son he says, Thy throne, O God, is unto the age of the age; and the scepter of righteousness is the scepter of thy kingdom.

Therefore he ought in all things to be made like unto his brethren, in order that he might be a merciful and faithful High Priest in things appertaining to God, to the end that he may atone for the sins of the people.

For every high priest, being received from men, presides over men in the things appertaining to God, in order that he may offer gifts and sacrifices for sins:

for the law made nothing perfect, but the bringing in of a better hope, by which we draw nigh unto God.

wherefore he is also able to save to the uttermost those coming unto God through him, ever living to intercede for them.

how much more shall the blood of Christ, who through the eternal Spirit offered up himself without spot to God, purify our conscience from dead works to serve the living God?

then I said, Lo, I come in the volume of the Book it has been written of me to do thy will, O God.

By faith Abel offered up to God a more acceptable sacrifice than Cain, through which he received the witness that he was righteous, God witnessing to his gifts: and through it he having died is still speaking.

but without faith it is impossible to please him: for it behooves the one coming unto God to believe that he is, and he is a rewarder unto them who seek him out.

to the whole company, and to the church of the first-born, who have been written in the heavens, and to God the Judge of all, and to the spirits of justified people who have been made perfect,

Therefore let us offer to God a sacrifice of praise continually, that is, the fruit of our lips, confessing to his name.