1 Corinthians 8:4

As to eating things, then, that have been offered to idols, we all know that no idol has any real existence, and that there is no God but one.

1 Corinthians 10:20

No, but that what the heathen sacrifice they offer to demons and not to God, and I do not want you to have fellowship with demons.

Treasury of Scripture Knowledge

Summary

Wherefore the anger of the LORD was kindled against Amaziah, and he sent unto him a prophet, which said unto him, Why hast thou sought after the gods of the people, which could not deliver their own people out of thine hand?

Bible References

Which could

1 Corinthians 8:4
As to eating things, then, that have been offered to idols, we all know that no idol has any real existence, and that there is no God but one.
1 Corinthians 10:20
No, but that what the heathen sacrifice they offer to demons and not to God, and I do not want you to have fellowship with demons.