1 Corinthians 10:20-21

But those things which they sacrifice, they sacrifice to demons, and not to God. But I do not wish you to be the communicants of demons.

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 16:14

for these are the spirits of demons, working miracles, which go forth to the kings of the whole earth, to lead them together into the war of the great day of God Almighty.

Treasury of Scripture Knowledge

Summary

And he ordained him priests for the high places, and for the devils, and for the calves which he had made.

Bible References

For the devils

1 Corinthians 10:20
But those things which they sacrifice, they sacrifice to demons, and not to God. But I do not wish you to be the communicants of demons.
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 16:14
for these are the spirits of demons, working miracles, which go forth to the kings of the whole earth, to lead them together into the war of the great day of God Almighty.