'O God' in the Bible

We continually give thanks to God because of you all, while we make mention of you in our prayers.

For when others speak of us they report the reception we had from you, and how you turned from your idols to God, to be bondservants of the true and ever-living God,

And for this further reason we render unceasing thanks to God, that when you received God's Message from our lips, it was as no mere message from men that you embraced it, but as--what it really is--God's Message, which also does its work in the hearts of you who believe.

Those Jewish persecutors killed both the Lord Jesus and the Prophets, and drove us out of their midst. They are displeasing to God, and are the enemies of all mankind;

For what thanksgiving on your behalf can we possibly offer to God in return for all the joy which fills our souls before our God for you,