'Mercy' in the Bible

and when Yahweh your God shall deliver them up before you, and you shall strike them; then you shall utterly destroy them: you shall make no covenant with them, nor show mercy to them;

Nothing of the devoted thing shall cling to your hand; that Yahweh 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;