'Unclean Spirit' in the Bible

And I saw coming out of the mouth of the dragon, and out of the mouth of the beast, and out of the mouth of the false prophet, three unclean spirits, like frogs.

And he gave a loud cry, saying, Babylon the great has come down from her high place, she has come to destruction and has become a place of evil spirits, and of every unclean spirit, and a hole for every unclean and hated bird.