Deuteronomy 16:20

16:20 You must pursue justice alone so that you may live and inherit the land the Lord your God is giving you.

Deuteronomy 20:16

Laws Concerning War with Canaanite Nations

20:16 As for the cities of these peoples that the Lord your God is going to give you as an inheritance, you must not allow a single living thing to survive.

Deuteronomy 30:19

30:19 Today I invoke heaven and earth as a witness against you that I have set life and death, blessing and curse, before you. Therefore choose life so that you and your descendants may live!