1 Corinthians 8:4
Therefore concerning the eating of food sacrificed to idols, we know that an idol is nothing in the world, and that there is no God but one.
1 Corinthians 10:19-20
What do I mean then? That a thing offered to idols is anything, or that an idol is anything?
1 Timothy 4:1
Now the Spirit expressly says that in later times some will fall away from the faith by giving heed to deceitful spirits and doctrines of demons,
Revelation 9:20
The rest of mankind, who were not killed by these plagues, did not repent of the works of their hands nor give up worshipping demons and idols of gold and silver and bronze and stone and wood, which can neither see nor hear nor walk;