'O God' in the Bible

Their deeds do not permit them to return them to God. Because a spirit of whoredom [is] in their midst, they do not know Yahweh.

They will send up to me a cry for help: We, Israel, have knowledge of you, O God of Israel.

For from Israel is even this; the workman made it, and it is no God; yea, the calf of Samaria shall be broken in pieces.

Do not rejoice, O Israel, with exultation as do the [pagan] peoples,For you have played the prostitute, turning away from your God.You have loved prostitutes’ earnings on every threshing floor [attributing the harvest to the Baals instead of to God].

Yet I am the LORD thy God from the land of Egypt, and thou shalt know no god but me: for there is no saviour beside me.