Deuteronomy [Second Torah] 20:15-19

¹⁵Thus you shall do to all the cities which are very far off from you, which are not of the cities of these nations.

¹⁶But of the cities of these peoples, that Adonai your God gives you for an inheritance, you shall save alive nothing that breathes;

¹⁷but you shall utterly destroy them: the Hittite Descendant of Trembling fear, the Amorite Descendants of Talkers, the Canaanite Descendant of Humbled, the Perizzite Descendant of Belonging to village, the Hivite Wicked, and the Jebusite Descendants of Thresher; as Adonai your God has enjoined you;

¹⁸that they not teach you to follow all their abominations, which they have done to their deities; so would you sin against Adonai your God.

¹⁹When you shall besiege a city a long time, in making war against it to take it, you shall not destroy its trees by wielding an ax against them; for you may eat of them. You shall not cut them down; for is the tree of the field man, that it should be besieged by you?