Deuteronomy 19:5; Deuteronomy 20:19

Deuteronomy 19:5

5 as when a man goes into the forest with his friend to cut wood, and his hand swings the axe to cut down the tree, and the iron head slips off the handle and strikes his friend so that he dies -he may flee to one of these cities and live;

Deuteronomy 20:19

19 "When you besiege a city a long time, to make war against it in order to capture it, you shall not destroy its 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 by you?