'Demons' in the Bible

But the rest of mankind who were not killed by these plagues, did not even then repent and leave the things they had made, so as to cease worshipping the demons, and the idols of gold and silver, bronze, stone, and wood, which can neither see nor hear, nor move.

For they are the spirits of demons working marvels--spirits that go out to control the kings of the whole earth, to assemble them for the battle which is to take place on the great day of God, the Ruler of all.

and with a mighty voice he cried out, saying, "Great Babylon has fallen, has fallen, and has become a home for demons and a stronghold for every kind of foul spirit and for every kind of foul and hateful bird.