Deuteronomy 20:20; Deuteronomy 28:26

20 Only the trees which thou knowest that they be not trees for meat, thou shalt destroy and cut them down; and thou shalt build bulwarks against the city that maketh war with thee, until it be subdued.

26 And thy carcase shall be meat unto all fowls of the air, and unto the beasts of the earth, and no man shall fray them away.