Deuteronomy 13:17 in the King James Version
And there shall cleave nought of the cursed thing to thine hand: that the LORD may turn from the fierceness of his anger, and shew thee mercy, and have compassion upon thee, and multiply thee, as he hath sworn unto thy fathers;
Context
16 You shall gather all its plunder into the middle of its street, and shall burn with fire the city, with all of its plunder, to the LORD your God. It shall be a heap forever. It shall not be built again.
17 Nothing of the devoted thing shall cling to your hand, that the LORD may turn from the fierceness of his anger and show you mercy, and have compassion on you and multiply you, as he has sworn to your fathers,
18 when you listen to the LORD your God’s voice, to keep all his commandments which I command you today, to do that which is right in the LORD your God’s eyes.