'O God' in the Bible

In all this Job sinned not, nor ascribed anything unseemly to God.

But as for me I will seek unto God, and unto God commit my cause;

If thou seek earnestly unto God, and make thy supplication to the Almighty,

And they say unto God, Depart from us, for we desire not the knowledge of thy ways!

Can a man be profitable to God? surely it is unto himself that the wise man is profitable.

Who said unto God, Depart from us! and what could the Almighty do to them?

For hath he said unto God, I bear chastisement, I will not offend;

Who provideth for the raven his food, when his young ones cry unto God, and they wander for lack of meat?