Did not Achan the son of Zerah commit a trespass in the accursed thing, and wrath fell on all the congregation of Israel? and that man perished not alone in his iniquity. Did not Achan the son of Zerah - Your sin will not be merely against yourselves; your transgressions will bring down the wrath of God upon all the people; this was the case in the transgression of Achan; he alone sinned, and yet God on that account turned his face against the whole congregation, so that they fell before their enemies. We cannot therefore be unconcerned spectators of your transgression, we may all be implicated in its criminality; let this and the dishonor which we apprehend is done to our God plead our excuse, and vindicate the necessity of the present warlike appearance which we make before you. See the history of Achan referred to here, (Joshua 7:11-26 (note)), and the notes there.
Related Commentaries of Joshua 22:20
Joshua 22:20
20 Did not Achan the son of Zerah commit a trespass in the accursed thing, and wrath fell on all the congregation of Israel? and that man perished not alone in his iniquity.