Deuteronomy 20:18-19

18so that they will not teach you to act in accordance with all the detestable practices which they have done [in worship and service] for their gods, and in this way cause you to sin against the Lord your God.

19“When you besiege a city for a long time, making war against it in order to capture it, you shall not destroy its [fruit-bearing] trees by swinging an axe against them; for you may eat from them, and you shall not cut them down. For is the tree of the field a man, that it should be besieged (destroyed) by you?