Joshua 7:12

This is why the Israelites cannot stand against their enemies. They will turn their backs and run from their enemies, because they themselves have been set apart for destruction. I will no longer be with you unless you remove from among you whatever is devoted to destruction.

Therefore the children of Israel could not stand before their enemies, but turned their backs before their enemies, because they were accursed: neither will I be with you any more, except ye destroy the accursed from among you.