'O God' in the Bible

Hath a nation changed its gods, which yet are no gods? but my people have changed their glory for that which doth not profit.

How can I pardon thee? thy children have forsaken me, and sworn by them that are no gods: when I had fed them to the full, they committed adultery, and assembled themselves in troops at the harlots houses.

Shall a man make unto himself gods, which yet are no gods?