3 Neither shalt thou make marriages with them. Thou shalt not give thy daughter to his son, nor take his daughter for thy son:
Deuteronomy 7:3 Cross References - DouayRheims
15 Make no covenant with the men of those countries; lest, when they have committed fornication with their gods, and have adored their idols, some one call thee to eat of the things sacrificed. 16 Neither shalt thou take of their daughters a wife for thy son, lest after they themselves have committed fornication, they make thy sons also to commit fornication with their gods.
12 But if you will embrace the errors of these nations that dwell among you, and make marriages with them, and join friendships: 13 Know ye for a certainty that the Lord your God will not destroy them before your face, but they shall be a pit and a snare in your way, and a stumbling-block at your side, and stakes in your eyes, till he take you away and destroy you from off this excellent land, which he hath given you.
2 Of the nations concerning which the Lord said to the children of Israel: You shall not go in unto them, neither shall any of them come into yours: for they will most certainly turn away your hearts to follow their gods. And to these was Solomon joined with a most ardent love.
1 And after these things were accomplished, the princes came to me, saying: The people of Israel, and the priests and Levites have not separated themselves from the people of the lands, and from their abominations, namely, of the Chanaanites, and the Hethites, and the Pherezites, and the Jebusites, and the Ammonites, and the Moabites, and the Egyptians, and the Amorrhites. 2 For they have taken of their daughters for themselves and for their sons, and they have mingled the holy seed with the people of the lands. And the hand of the princes and magistrates hath been first in this transgression.
23 In those days also I saw Jews that married wives, women of Azotus, and of Ammon, and of Moab. 24 And their children spoke half in the speech of Azotus, and could not speak the Jews' language, but they spoke according to the language of this and that people. 25 And I chid them, and laid my curse upon them. And I beat some of them, and shaved off their hair, and made them swear by God that they would not give their daughters to their sons, nor take their daughters for their sons, nor for themselves, saying: 26 Did not Solomon king of Israel sin in this kind of thing: and surely among many nations, there was not a king like him, and he was beloved of his God, and God made him king over all Israel: and yet women of other countries brought even him to sin. 27 And shall we also be disobedient and do all this great evil to transgress against our God, and marry strange women:
14 Bear not the yoke with unbelievers. For what participation hath justice with injustice? Or what fellowship hath light with darkness? 15 And what concord hath Christ with Belial? Or what part hath the faithful with the unbeliever? 16 And what agreement hath the temple of God with idols? For you are the temple of the living God: as God saith: I will dwell in them and walk among them. And I will be their God: and they shall be my people. 17 Wherefore: Go out from among them and be ye separate, saith the Lord, and touch not the unclean thing: