'O God' in the Bible

and have cast their gods into the fire, for they were no gods, but the work of men's hands, wood and stone; so they have destroyed them.

You are My witnesses, says Jehovah, and My servant whom I have chosen; that you may know and believe Me, and understand that I am He. Before Me no God was formed, nor shall there be after Me.

So says Jehovah, the King of Israel, and His redeemer Jehovah of Hosts; I am the first, and I am the last; and besides Me there is no God.

I am Jehovah, and there is none else, no God besides Me; I clothed you, though you have not known Me;

Truly You are a God who hides Yourself, O God of Israel, the Savior.

Yet they seek Me daily, and delight to know My ways, as a nation that did righteousness, and one who did not forget the ordinance of their God. They ask of Me the ordinances of justice; they take delight in drawing near to God.