Deuteronomy 20:17-19

American Standard Version

¹⁷ but thou shalt ^[a]utterly destroy them: the Hittite, and the Amorite, the Canaanite, and the Perizzite, the Hivite, and the Jebusite; as Jehovah thy God hath commanded thee; ¹⁸ that they teach you not to do after all their abominations, which they have done unto their gods; so would ye sin against Jehovah your God.

¹⁹ When thou shalt besiege a city a long time, in making war against it to take it, thou shalt not destroy the trees thereof by wielding an axe against them; for thou mayest eat of them, and thou shalt not cut them down; for is the tree of the field man, that it should be besieged of thee?