Revelation 7:9-17New Revised Standard Version (NRSV)
The Multitude from Every Nation
9 After this I looked, and there was a great multitude that no one could count, from every nation, from all tribes and peoples and languages, standing before the throne and before the Lamb, robed in white, with palm branches in their hands. 10 They cried out in a loud voice, saying,
“Salvation belongs to our God who is seated on the throne, and to the Lamb!”
11 And all the angels stood around the throne and around the elders and the four living creatures, and they fell on their faces before the throne and worshiped God, 12 singing,
“Amen! Blessing and glory and wisdom
13 Then one of the elders addressed me, saying, “Who are these, robed in white, and where have they come from?” 14 I said to him, “Sir, you are the one that knows.” Then he said to me, “These are they who have come out of the great ordeal; they have washed their robes and made them white in the blood of the Lamb.
15 For this reason they are before the throne of God,