Like his own dung; which men cast away with contempt and abhorrency. Compare 1 Kings 14:10 2 Kings 9:37. They which have seen him, with admiration at his felicity. Where is he? i.e. he is no where to be found; he is utterly lost and gone.
Related Commentaries of Job 20:7
Job 20:7
7 Yet he shall perish for ever like his own dung: they which have seen him shall say, Where is he?