Elihu asks this rhetorical question to emphasize that no one has ever taught God what to do. Alternate translation: "No one has ever instructed him about what he should do." (See: [[rc://en/ta/man/translate/figs-rquestion]])
Elihu asks this rhetorical question to emphasize that no one can accuse God of having committed unrighteousness. Alternate translation: "No one can ever say to him, 'You have committed unrighteousness.'" (See: [[rc://en/ta/man/translate/figs-rquestion]])