Revelation 15:2-3

2Then I saw something like a sea of glass mixed with fire, and those who had conquered the beast and his image and the number of his name. They were standing by the sea of glass, holding harps given to them by God.

3They sang the song of Moses the servant of God and the song of the Lamb: “Great and astounding are your deeds, Lord God, the All-Powerful! Just and true are your ways, King over the nations!