Deuteronomy 12:2-3

12:2 You must by all means destroy all the places where the nations you are about to dispossess worship their gods – on the high mountains and hills and under every leafy tree. 12:3 You must tear down their altars, shatter their sacred pillars, burn up their sacred Asherah poles, and cut down the images of their gods; you must eliminate their very memory from that place.