Exodus 34:15-17

New Revised Standard Version, Anglicised Catholic Edition

¹⁵ You shall not make a covenant with the inhabitants of the land, for when they prostitute themselves to their gods and sacrifice to their gods, someone among them will invite you, and you will eat of the sacrifice. ¹⁶ And you will take wives from among their daughters for your sons, and their daughters who prostitute themselves to their gods will make your sons also prostitute themselves to their gods.

¹⁷ You shall not make cast idols.