Revelation 7:9-10

9After these things I looked, and behold, a vast multitude that no one could count—from every nation and all tribes and peoples and tongues—was standing before the throne and before the Lamb. They were clothed in white robes, with palm branches in their hands

10and crying out with a loud voice, saying, “Salvation belongs to our God, who sits on the throne, and to the Lamb!”