'O God' in the Bible

We give thanks to God always for all of you, mentioning you in our prayers;

For they themselves report about us what kind of a reception we had with you, and how you turned to God from idols to serve a living and true God,

For what thanksgiving can we render to God for you in return for all the joy which we feel for your sake before our God,

For if we believe that Jesus died and rose again, even so God will bring with him those who have fallen asleep in Jesus.