'O God' in the Bible

We are bound to give thanks to God always to you, brethren, even as it is meet, for that your faith growth exceedingly, and the love of each one of you all toward one another aboundeth;

For these are a plain token of God's righteous judgement, which has in view your being deemed worthy of admission to God's Kingdom, for the sake of which, indeed, you are sufferers.

Since it is a righteous thing according to God to repay restriction to those who restrict you,

But we are bound to give thanks alway to God for you, brethren beloved of the Lord, because God hath from the beginning chosen you to salvation through sanctification of the Spirit and belief of the truth:

May the Lord direct your hearts to God’s love and Christ’s endurance.