Joshua 7:12-13

12So Bnei-Yisrael cannot stand before their enemies. So they turn their necks before their enemies, because they have come under the ban. I will not be with you any more unless you destroy whatever is under the ban from among you.

13Arise! Consecrate the people and say, ‘Consecrate yourselves for tomorrow, for thus says Adonai, the God of Israel: Something under the ban is in the midst of you, Israel. You will not be able to stand up before your enemies until you remove whatever is under the ban from among you.