'O God' in the Bible

But of the Son He says,“Your throne, O God, is forever and ever,And the righteous scepter is the scepter of His kingdom.

Therefore, He had to be made like His brethren in all things, so that He might become a merciful and faithful high priest in things pertaining to God, to make propitiation for the sins of the people.

For every high priest taken from among men is appointed on behalf of men in things pertaining to God, in order to offer both gifts and sacrifices for sins;

(for the Law made nothing perfect), and on the other hand there is a bringing in of a better hope, 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(In the scroll of the book it is written of Me)To do Your will, O God.’”

By faith Abel offered to God a better sacrifice than Cain, through which he obtained the testimony that he was righteous, God testifying about his gifts, and through faith, though he is dead, he still speaks.

By faith Enoch was taken up so that he would not see death; and he was not found because God took him up; for he obtained the witness that before his being taken up he was pleasing to God.

And without faith it is impossible to please Him, for he who comes to God must believe that He is and that He is a rewarder of those who seek Him.

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

Therefore, since we receive a kingdom which cannot be shaken, let us show gratitude, by which we may offer to God an acceptable service 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 give thanks to His name.