Deuteronomy 20:19-20

19 When you lay siege to a city for an extended time while fighting against it to capture it, you must not destroy its trees by putting an axe to them, because you can eat their fruit. You must not cut them down. Are the trees of the field human, that you should besiege them?

20 But you may destroy the trees that you know do not produce fruit. Use them to build siege works against the city that is waging war against you, until it falls.

Deuteronomy 20:19-20 Meaning and Commentary

INTRODUCTION TO DEUTERONOMY 20

In this chapter rules are given to be observed in times of war. When a battle was near, a priest was to address the soldiers, and encourage them to fight, De 20:1-4, then the officers were to declare who might return home, De 20:5-9 when an enemy's city was approached, peace was to be proclaimed on certain conditions, which, if accepted of, the inhabitants were to be tributaries and servants, but if not, when taken, all were to be put to the sword, excepting women, children, and cattle, De 20:10-15, but those of the seven nations were to be utterly destroyed, De 20:16-18, and, during a siege, no trees bearing fruit fit for food were to be cut down, De 20:19.