1 Corinthians 8:4

Now as to eating food that has been offered to idols, we know well that an idol has no real existence in the universe, and that there is no God but One.

1 Corinthians 10:20

On the contrary, what the heathen sacrifice they sacrifice to demons and not to God, and I do not want you to have communion 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
Now as to eating food that has been offered to idols, we know well that an idol has no real existence in the universe, and that there is no God but One.
1 Corinthians 10:20
On the contrary, what the heathen sacrifice they sacrifice to demons and not to God, and I do not want you to have communion with demons.