In this passage near the end of the book, Job appears preeminently as an effective petitioner on behalf of his friends. These men are restored to God’s favor by Job’s praying for them, and Job himself recovers by his praying for them. …We learn of Job’s intercessions almost before we discover anything else about him. Concerned for the welfare of his children, we are told, Job “would rise early in the morning and offer burnt offerings according to the number of them all” (Job 1:5). Let me suggest that between Job’s intersessions at the beginning and the end of the book, we may regard chapters 2 through 37 as a kind of Satanic distraction to Job’s life of prayer.
From The Trial of Job by Patrick Henry Reardon (8-9).