Deuteronomy 20:11-13

Holman Christian Standard Bible

¹¹ If it accepts your offer of peace and opens its gates to you, all the people found in it will become forced laborers for you and serve you. ¹² However, if it does not make peace with you but wages war against you, lay siege to it. ¹³ When the Lord your God hands it over to you, you must strike down all its males with the sword.