Joshua 7:12-13

Therefore the children of Israel could not stand before their enemies, but turned their backs before their enemies, because they have become doomed to destruction. Neither will I be with you anymore, unless you destroy the accursed from among you. Get up, sanctify the people, and say, ‘Sanctify yourselves for tomorrow, because thus says the LORD God of Israel: “There is an accursed thing in your midst, O Israel; you cannot stand before your enemies until you take away the accursed thing from among you.”