Revelation 18:2

And he cried mightily with a great voice, saying, Babylon the great is fallen, is fallen, and is become the habitation of demons, and the hold of every impure spirit, and the cage of every unclean and hateful bird.

Treasury of Scripture Knowledge

Summary

As a cage is full of birds, so are their houses full of deceit: therefore they are become great, and waxen rich.

Bible References

Cage

Revelation 18:2
And he cried mightily with a great voice, saying, Babylon the great is fallen, is fallen, and is become the habitation of demons, and the hold of every impure spirit, and the cage of every unclean and hateful bird.