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.
KJV
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.
ASV
Therefore the children of Israel cannot stand before their enemies; they turn their backs before their enemies, because they are become accursed: I will not be with you any more, except ye destroy the devoted thing from among you.