When Achan disobeyed, the people of Israel suffered defeat at the city of Ai, and a number of them died. Achan did not admit to his theft until he was exposed.
وَشَرُّ ٱلْإِنْسَانِ آنَذَاكَ حَدَا بِٱللهِ إِلَى إِهْلَاكِ كُلِّ ٱلْجِنْسِ ٱلْبَشَرِيِّ ،‏ مَا عَدَا نُوحًا وَعَائِلَتَهُ .‏ —‏ تك ٦ :‏ ​ ٤ -‏ ٧ ،‏ ١١ ،‏ ١٢‏ .‏