'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 cried out with a powerful voice, saying, "Fallen, fallen [is] Babylon the great, and it has become a dwelling place of demons and a haunt of every unclean spirit and a haunt of every unclean bird and a haunt of every unclean and detested animal.