Deuteronomy 7:1-3

Douay-Rheims 1899 American Edition

7 When the Lord thy God shall have brought thee into the land, which thou art going in to possess, and shall have destroyed many nations before thee, the Hethite, and the Gergezite, and the Amorrhite, and the Chanaanite, and the Pherezite, and the Hevite, and the Jebusite, seven nations much more numerous than thou art, and stronger than thou:

² And the Lord thy God shall have delivered them to thee, thou shalt utterly destroy them. Thou shalt make no league with them, nor shew mercy to them:

³ Neither shalt thou make marriages with them. Thou shalt not give thy daughter to his son, nor take his daughter for thy son: