'O God' in the Bible

But the angel of Jehovah said to Elijah the Tishbite, Arise! Go up to meet the messengers of the king of Samaria and say to them, Is it not because no God is in Israel that you go to ask of Baal-zebub the god of Ekron?

And they said to him, A man came up to meet us and said to us, Go, turn again to the king who sent you, and say to him, So says Jehovah, Is it not because no God is in Israel that you go to ask of Baal-zebub the god of Ekron? Therefore, you shall not come down from that bed on which you have gone up, but shall surely die.

And he said to him, So says Jehovah, Because you have sent messengers to ask of Baal-zebub the god of Ekron, Is it not because no God is in Israel to seek His Word? Therefore you shall not come down off that bed on which you have gone up, but shall surely die.

And he returned to the man of God, he and all his company. And he came and stood before him. And he said, Behold, now I know that there is no God in all the earth, but in Israel. And now please take a blessing from your servant.

And Joash said to the priests, All the silver from things dedicated to God, which is brought into the house of Jehovah, the silver from each man the silver of his valuation, all the silver that comes into any man's heart to bring to the house of Jehovah,

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