Exodus 34:12-14

12Be careful not to make a treaty with those who live in the land where you are going, or they will be a snare among you. 13Break down their altars, smash their sacred stones and cut down their Asherah poles. That is, wooden symbols of the goddess Asherah

14Do not worship any other god, for the LORD, whose name is Jealous, is a jealous God.