But the children of Israel committed a trespass in the accursed thing,.... Or concerning it, with respect to it, by taking part of what was devoted to another use, and forbidden theirs: this was done, not by the whole body of the people, only by one of them; but it not being discovered who it was, it was imputed to the whole, on whom it lay to find out the guilty person and punish him, or else the whole must suffer for it: this chapter begins with a "but", and draws a vail over the fame and glory of Joshua, observed in Jos 6:27, for Achan, the son of Carmi, the son of Zabdi, the son of Zerah, of the tribe of Judah, took of the accursed thing; of what was devoted to the Lord and to sacred uses; this he had taken to himself out of the spoil of the city of Jericho, for his own use, contrary to the command of God: his descent is particularly described, that it might be known of what family and tribe he was; and it is traced up to Zerah, who was a son of Judah, Gen 38:30, and the anger of the Lord was kindled against the children of Israel; because of the sin of Achan.