1 Corinthians 10:18

16The cup of blessing which we bless, isn’t it a sharing of the blood of Christ? The bread which we break, isn’t it a sharing of the body of Christ?

17Because there is one loaf of bread, we, who are many, are one body; for we all partake of the one loaf of bread.

18Consider Israel according to the flesh. Don’t those who eat the sacrifices participate in the altar?

19What am I saying then? That a thing sacrificed to idols is anything, or that an idol is anything?

20But I say that the things which the Gentiles sacrifice, they sacrifice to demons and not to God, and I don’t desire that you would have fellowship with demons.