Exodus 34:16-18

Young's Literal Translation

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.