Exodus 34:14

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 destroy their altars, break their images, and cut down their groves:

14For thou shalt worship no other god: for the LORD, whose name is Jealous, is a jealous God:

15Lest thou make a covenant with the inhabitants of the land, and they go a whoring after their gods, and do sacrifice unto their gods, and one call thee, and thou eat of his sacrifice;

16And thou take of their daughters unto thy sons, and their daughters go a whoring after their gods, and make thy sons go a whoring after their gods.