REV 15:2

2 And I saw, as it were, a yam [(sea)] of glass, having been mingled with eish [(fire)]; and I saw the menatzakhat HaChayyah [(overcomers of the Beast, Anti-Moshiach)] and of its Atzav [(image)] and of the mispar [(number)] of its name; and I saw them having taken their stand on the yam [(sea)] of glass, holding nevalim [(harps)] of Hashem.