Deuteronomy 20:10-12

New Catholic Bible

¹⁰ When you approach a city to do battle with it, offer it terms of peace. ¹¹ If they accept your terms of peace and open their gates to you, then all the people who live there shall be subject to forced labor done on your behalf. ¹² If they refuse your terms of peace, then you will do battle with them, besieging that city.