2 Corinthians 6:14-18

14 Don't be unequally yoked with unbelievers, for what fellowship have righteousness and iniquity? Or what communion has light with darkness?  15 What agreement has Christ with Belial? Or what portion has a believer with an unbeliever?  16 What agreement has a temple of God with idols? For you are a temple of the living God. Even as God said, "I will dwell in them, and walk in them; and I will be their God, and they will be my people."  17 Therefore,  "'Come out from among them,  And be separate,' says the Lord,  'Touch no unclean thing.  I will receive you.

18 I will be to you a Father.  You will be to me sons and daughters,'  says the Lord Almighty."