Deuteronomy 7:2-4

Young's Literal Translation

² and Jehovah thy God hath given them before thee, and thou hast smitten them -- thou dost utterly devote them -- thou dost not make with them a covenant, nor dost thou favour them.

³ `And thou dost not join in marriage with them; thy daughter thou dost not give to his son, and his daughter thou dost not take to thy son,

⁴ for he doth turn aside thy son from after Me, and they have served other gods, and the anger of Jehovah hath burned against you, and hath destroyed thee hastily.