King James Version
And when the LORD thy God shall deliver them before thee; thou shalt smite them, and utterly destroy them; thou shalt make no covenant with them, nor shew mercy unto them:English Standard Version
and when the LORD your God gives them over to you, and you defeat them, then you must devote them to complete destruction. You shall make no covenant with them and show no mercy to them.Catholic Public Domain Version
and when the Lord your God will have delivered them to you, you shall strike them down unto utter annihilation. You shall not enter into a pact with them, nor shall you show any pity to them