'Demons' in the Bible

The rest of humanity, who had not been killed by these plagues, did not repent of the works of their hands, so that they did not stop worshiping demons and idols made of gold, silver, bronze, stone, and wood -- idols that cannot see or hear or walk about.

For they are the spirits of the demons performing signs who go out to the kings of the earth to bring them together for the battle that will take place on the great day of God, the All-Powerful.

He shouted with a powerful voice: "Fallen, fallen, is Babylon the great! She has become a lair for demons, a haunt for every unclean spirit, a haunt for every unclean bird, a haunt for every unclean and detested beast.