Deuteronomy 20:16

16 But in the case of any of the cities of these peoples—the ones the LORD your God is giving you as an inheritance—you must not spare any living thing.

Deuteronomy 20:16 In-Context

14 However, you can take for yourselves the women, the children, the animals, and all that is in the city—all its plunder. You can then enjoy your enemies' plunder, which the LORD your God has given you.
15 That's what you must do to all the cities that are located far away from you—specifically, those cities that don't belong to these nations here.
16 But in the case of any of the cities of these peoples—the ones the LORD your God is giving you as an inheritance—you must not spare any living thing.
17 Instead, you must place these under the ban: Hittites, Amorites, Canaanites, Perizzites, Hivites, and Jebusites—just as the LORD your God commanded you.
18 Then they can't teach you to do all the detestable things they did for their gods, with the result that you end up sinning against the LORD your God.
Copyright © 2011 Common English Bible