Devarim 20:17-19

Orthodox Jewish Bible

¹⁷ But thou shalt utterly put them under cherem of destruction; namely, the Chitti, and the Emori, the Kena’ni, and the Perizzi, the Chivi, and the Yevusi; as Hashem Eloheicha hath commanded thee;

¹⁸ That they teach you not to do after all their to’evot (abominations) which they have done unto their elohim; so that ye would sin against Hashem Eloheichem.

¹⁹ When thou shalt besiege a town yamim rabbim, in making war against it to take it, thou shalt not destroy the trees thereof by forcing an axe against them; although thou mayest eat of them, thou shalt not cut them down. Are the etz hasadeh men that they should come under your siege?