1 Corinthians 8:4

Now concerning [the matter of] eating foods [once] offered as sacrifices to idols, we know that an idol is [really] nothing in the world [at all], and that there is only one God.

1 Corinthians 10:20

[Certainly not!] But I am saying that the Gentile sacrifices are [really] offered to evil spirits and not to God. And I do not want you to have fellowship with evil spirits.

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 concerning [the matter of] eating foods [once] offered as sacrifices to idols, we know that an idol is [really] nothing in the world [at all], and that there is only one God.
1 Corinthians 10:20
[Certainly not!] But I am saying that the Gentile sacrifices are [really] offered to evil spirits and not to God. And I do not want you to have fellowship with evil spirits.