Deuteronomy 3:4

3:4 We captured all his cities at that time – there was not a town we did not take from them – sixty cities, all the region of Argob, the dominion of Og in Bashan.

Deuteronomy 20:19

20:19 If you besiege a city for a long time while attempting to capture it, you must not chop down its trees, for you may eat fruit from them and should not cut them down. A tree in the field is not human that you should besiege it!