Job has done nothing wrong.

The text establishes this before the story begins. Job is blameless and upright, one who fears God and turns away from evil. There is none like him on the earth. The assessment is God’s, spoken to the adversary who has come among the sons of God in the divine council, as if God Himself is pointing out the one person whose suffering will most directly challenge the theology the rest of the Old Testament has been building.

Then everything is taken. Children. Livestock. Health. The boils cover Job from sole to crown. He sits in the ash heap, scraping himself with broken pottery, while his wife advises him to curse God and die. And God permits this to prove a point to the adversary.