Revelation 15:2-4 NIV

2 And I saw what looked like a sea of glass1 mixed with fire and, standing beside the sea, those who had been victorious2 over the beast3 and his image4 and over the number of his name.5 They held harps6 given them by God

References for Revelation 15:2

3 and sang the song of Moses7 the servant of God8 and the song of the Lamb:9 "Great and marvelous are your deeds,10 Lord God Almighty.11 Just and true are your ways,12 King of the ages.

References for Revelation 15:3

4 Who will not fear you, O Lord,13 and bring glory to your name?14 For you alone are holy. All nations will come and worship before you,15 for your righteous acts16 have been revealed."

References for Revelation 15:4