Therefore listen to me, O men of understanding. Far be it from God to do wrong, and from the Almighty to act unjustly.
The scope of Elihu's discourse to reconcile Job to his afflictions and to pacify his spirit under them. In order to this he had shown, in the foregoing chapter, that God meant him no hurt in afflicting him, but intended it for his spiritual benefit. In this chapter he shows that he did him no wrong in afflicting him, nor punished him more than he deserved.
Commenting on Job 34:10-15
For the work of a man will he render unto him,.... The reward of his work, as Ben Gersom interprets it, whether the work of a wicked man or of a good man: and cause every man to find according to his ways.
The true answer to Job, which God follows up (Job 38:1-41). Man is to believe God's ways are right, because they are His, not because we fully see they are so (Rom 9:14; Deu 32:4; Gen 18:25).