1 Corinthians 10:18-20

Young's Literal Translation

¹⁸ See Israel according to the flesh! are not those eating the sacrifices in the fellowship of the altar?

¹⁹ what then do I say? that an idol is anything? or that a sacrifice offered to an idol is anything? --

²⁰ [no,] but that the things that the nations sacrifice -- they sacrifice to demons and not to God; and I do not wish you to come into the fellowship of the demons.