'O God' in the Bible

praising God, and saying, Glory to God in the highest, and on earth peace, good-will towards men.

And in those days He went out to a mountain to pray, and He continued all night in prayer to God.

Are there none returning to give glory to God, but this stranger?

The pharisee standing by himself prayed thus, O God, I thank thee that I am not as other men are, rapacious, unjust, adulterous, or even as this publican.

But the publican standing at a distance did not presume so much as to lift up his eyes to heaven, but smote upon his breast, saying, O God, be merciful to me a sinner.

And immediately he received his sight, and followed Him, glorifying God: and all the people, when they saw it, gave praise unto God.

Then said He unto them, Render therefore unto Cesar the things that are Cesar's, and to God the things that are God's.