Thematic Bible: What cannot have communion together

Be not unequally yoked with unbelievers; for what participation has righteousness with wickedness? or what communion has light with darkness? and what agreement has Christ with Beliar, or what part has a believer with an unbeliever? and what agreement has a temple of God with idols? For you are a temple of the living God; as God said, I will dwell in them, and I will walk in them, and I will be to them a God and they shall be to me a people.

But what the gentiles sacrifice, they sacrifice to demons, and not to God; and I do not wish you to be partakers with demons. You cannot drink the Lord's cup and the cup of demons; you cannot partake at the Lord's table and the table of demons.