Revelation 7:9-11

9After these things I saw, and behold, a great multitude, which no man could number, out of every nation and of all tribes and peoples and tongues, standing before the throne and before the Lamb, arrayed in white robes, and palms in their hands;

10and they cry with a great voice, saying, Salvation unto our God which sitteth on the throne, and unto the Lamb.

11And all the angels were standing round about the throne, and about the elders and the four living creatures; and they fell before the throne on their faces, and worshipped God,