Joshua 7:12-13

That is why the Israelites cannot face their enemies. They turn away from the fight and run, because I have commanded that they be destroyed. I will not help you anymore unless you destroy everything as I commanded you. “Now go! Make the people holy. Tell them, ‘Set yourselves apart to the LORD for tomorrow. The LORD, the God of Israel, says some of you are keeping things he commanded you to destroy. You will never defeat your enemies until you throw away those things.