7 Heb “his”; the referent (Job) has been specified in the translation to indicate whose friends they were.
8 The perfect verb should be given the category of potential perfect here.
9 This is one of the eighteen “corrections of the scribes” (tiqqune sopherim); it originally read, “and they declared God [in the wrong].” The thought was that in abandoning the debate they had conceded Job’s point.

In other versions

He burned with anger also at Job’s three friends because they had found no answer, although they had declared Job to be in the wrong.

He was also angry with the three friends, because they had found no way to refute Job, and yet had condemned him.

He was also angry at Job’s three friends because they had failed to refute him and yet had condemned him.

He was also angry with Job’s three friends, for they made God appear to be wrong by their inability to answer Job’s arguments.

and he became angry at his three friends because they had not found an answer, and they had declared Job guilty.

Also against his three friends was his wrath kindled, because they had found no answer, and yet had condemned Job.

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