2 Corinthians 6:14-18

You are not the same as those who do not believe. So do not join yourselves to them. Good and bad do not belong together. Light and darkness cannot share together. How can Christ and Belial, the devil, have any agreement? What can a believer have together with a nonbeliever? The temple of God cannot have any agreement with idols, and we are the temple of the living God. As God said: “I will live with them and walk with them. And I will be their God, and they will be my people.” “Leave those people, and be separate, says the Lord. Touch nothing that is unclean, and I will accept you.” “I will be your father, and you will be my sons and daughters, says the Lord Almighty.”