1 Corinthians 8:4
Therefore concerning the eating of things offered to idols, we know that an idol is nothing in the world, and that there is no God except one.
1 Corinthians 10:19-20
Then what do I say? that idolatry is anything? or that an idol is anything?
1 Timothy 4:1
But the Spirit says positively, that in the last times certain ones will depart from the faith, giving heed to seducing spirits and to the teachings of demons,
Revelation 9:20
And the rest of the men who were not slain by these plagues did not repent of the works of their hands, that they should not worship demons, and idols of gold, and silver, and brass, and stone, and wood; which are neither able to see, nor to hear, nor to walk: