Exodus 34:16

13 for their altars ye break down, and their standing pillars ye shiver, and its shrines ye cut down;

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;

17 a molten god thou dost not make to thyself.

18 `The feast of unleavened things thou dost keep; seven days thou dost eat unleavened things, as I have commanded thee, at an appointed time, the month of Abib: for in the month of Abib thou didst come out from Egypt.

19 `All opening a womb [are] Mine, and every firstling of thy cattle born a male, ox or sheep;