Second Epistle of St. Paul to The Corinthians
Bear not the yoke with unbelievers. For what participation hath justice with injustice? Or what fellowship hath light with darkness?
And what concord hath Christ with Belial? Or what part hath the faithful with the unbeliever?
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.
Wherefore, Go out from among them, and be ye separate, saith the Lord, and touch not the unclean thing:
And I will receive you; and I will be a Father to you; and you shall be my sons and daughters, saith the Lord Almighty.
2 Corinthians 6: 14-18