Eliphaz
Eliphaz (see chapters 4, 5, and 15) will try again to fasten iniquity on Job. He mistakenly thinks that God can have no pleasure in a man who tries to please Him (verses 2 and 3). And he counts up more things to imagine Job has been guilty of, beside what Zophar had said. (See verses 5 to 9), He must have done these things, Eliphaz thinks, believing as before, that God was punishing Job for his sins,
The correct translation of verse 30 is, "Even him that is not innocent (or guiltless) shall he deliver; yea, he shall be delivered by the pureness of thy hands."
Eliphaz was speaking of himself, Zophar and Bildad, but his words were prophetic, as the close of the book shows. God gave him here to utter more than he knew.