'O God' in the Bible

[But] if we confess our sins [to God], He is faithful [to His promise] and righteous [in His judgment], and will forgive us of those sins and cleanse us from all of our wrongdoing.

but whoever obeys his word, in him love to God is really complete. This is how we may be sure we are in him:

Look at how much love the Father has shown to us [Christians], that we should be called His children! But, that is what we [really] are! The reason the people of the world do not know who we are is because they do not know who God [really] is.

By this the children of God and the children of the devil are clearly identified: anyone who does not practice righteousness [who does not seek God’s will in thought, action, and purpose] is not of God, nor is the one who does not [unselfishly] love his [believing] brother.

But whoever possesses this world's goods, and notices his brother in need, and shuts his heart against him, how can love to God remain in him?

Dearly beloved, if our hearts condemn us not, then have we trust to God ward;

Little children, you belong to God and have overcome them, because the one who is in you is greater than the one who is in the world.

We belong to God. The person who knows God listens to us. Whoever does not belong to God does not listen to us. This is how we know the Spirit of truth and the spirit of deceit.

Beloved, let us love one another, for love belongs to God, and everyone who loves is born of God and knows God;

(for love to God means keeping his commands). And his commands are not irksome,

If a man sees his brother doing a sin which is not bad enough for death, let him make a prayer to God, and God will give life to him whose sin was not bad enough for death. There is a sin whose punishment is death: I do not say that he may make such a request then.

We know that we belong to God, and that the whole world lies in the power of the evil One.

Little children (believers, dear ones), guard yourselves from idols—[false teachings, moral compromises, and anything that would take God’s place in your heart].