'O God' in the Bible

For we are the true circumcision--we who render to God a spiritual worship and make our boast in Christ Jesus and have no confidence in outward ceremonies:

Therefore let all of us who are mature believers cherish these thoughts; and if in any respect you think differently, that also God will make clear to you.

I have enough of everything--and more than enough. My wants are fully satisfied now that I have received from the hands of Epaphroditus the generous gifts which you sent me--they are a fragrant odor, an acceptable sacrifice, truly pleasing to God.