The Apocalypse of St. John the Apostle (Author John)
Chapter 19
6et audivi quasi vocem turbae magnae et sicut vocem aquarum multarum et sicut vocem tonitruum magnorum dicentium alleluia quoniam regnavit Dominus Deus noster omnipotens
Original from The Bible Foundation - bf.org. They claim public domain status for their original text.