Exodus 34:12-15

12Take heed to thyself, lest thou make a covenant with the inhabitants of the land whither thou goest, lest it be for a snare in the midst of thee: 13but ye shall break down their altars, and dash in pieces their pillars, and ye shall cut down their Asherim; 14(for thou shalt worship no other god: for Jehovah, whose name is Jealous, is a jealous God); 15lest thou make a covenant with the inhabitants of the land, and they play the harlot after their gods, and sacrifice unto their gods, and one call thee and thou eat of his sacrifice;