Exodus 34:14-16

Young's Literal Translation

¹⁴ for ye do not bow yourselves to another god -- for Jehovah, whose name [is] Zealous, is a zealous God.

¹⁵ `Lest thou make a covenant with the inhabitant of the land, and they have gone a-whoring after their gods, and have sacrificed to their gods, and [one] hath called to thee, and thou hast eaten of his sacrifice,

¹⁶ and thou hast taken of their daughters to thy sons, and their daughters have gone a-whoring after their gods, and have caused thy sons to go a-whoring after their gods;