Strong G169 ἀκάθαρτος akathartos · unclean

Revelation

1. Revelation 16:13
   And I saw three unclean spirits like frogs come out of the mouth of the dragon, and out of the mouth of the beast, and out of the mouth of the false prophet.
2. Revelation 18:2
   And he cried mightily with a strong voice, saying, Babylon the great is fallen, is fallen, and is become the habitation of devils, and the hold of every foul spirit, and a cage of every unclean and hateful bird.