"And when the Lord thy God shall deliver them before thee; thou shalt smite them, and utterly destroy them; thou shalt make no covenant with them, nor show mercy unto them. Neither shalt thou make marriages with them; thou daughter shalt not give unto his son, nor his daughter shalt thou take unto thy son… For thou art an holy people [a racially pure people]" (Deut. 7:2-3, 6).