Revelation 18:20-21

20Rejoice over her, O heaven, and you saints (God’s people) and apostles and prophets [who were martyred], because God has executed vengeance for you [through righteous judgment] upon her.”

21Then a single powerful angel picked up a boulder like a great millstone and flung it into the sea, saying, “With such violence will Babylon the great city be hurled down [by the sudden, spectacular judgment of God], and will never again be found.