Deuteronomy 12:2-3

2You shall utterly destroy all the places where the nations whom you shall dispossess serve their gods, on the high mountains and the hills and under every green [leafy] tree.

3You shall tear down their altars and smash their [idolatrous] pillars and burn their Asherim in the fire; you shall cut down the carved and sculpted images of their gods and obliterate their name from that place.