Revelation 7:9-10

9 After this I looked and there before me was a great multitude that no one could count, from every nation, tribe, people and language, standing before the throne and in front of the Lamb. They were wearing white robes and were holding palm branches in their hands. 10 And they cried out in a loud voice: "Salvation belongs to our God, who sits on the throne, and to the Lamb."