Deu Deuteronomy, chapter Book of Deuteronomy, chapter 20
When youi shall besiege a city a long time, in making war against it to take it, youi shall not destroy the trees thereof by forcing an axe against them: for youi may eat of them, and youi shall not cut them down (for the tree of the field [is] man’s [life]) to employ [them] in the siege:Jdg 2:17