1 Corinthians 10:20
Nay, but I say that the things which the gentiles sacrifice, they sacrifice to demons, and not to God; and I do not wish you to become partakers with the demons.
1 Corinthians 10:27-28
If one of the unbelieving invites you to a feast, and ye wish to go, whatsoever is set before you eat, asking no question because of conscience.
2 Corinthians 6:16-17
And what agreement has a temple of God with idols? for we are a temple of the living God, as God said, "I will dwell in them, and walk in them; and I will be their God, and they shall be My people."
Revelation 2:14
But I have a few things against you, because you have there those holding the teaching of Balaam, who taught Balak to cast a stumbling-block before the sons of Israel, to eat idol-sacrifices, and to commit fornication.