The Blood Washed Multitude
Revelation 7:9-17

"After this I beheld, and, lo, a great multitude, which no man could number, of all nations, and kindreds, and people, and tongues, stood before the Throne, and before the Lamb, clothed in white robes, and palms in their hands; and cried with a loud voice, 'Salvation to our God which sitteth upon the throne, and unto the Lamb.
And all the angels stood round about the Throne, and about the Elders and the Four Beasts, and fell before the Throne on their faces, and worshipped God, saying, Amen: Blessing and glory, and wisdom, and thanksgiving, and honor, and power, and might, be unto our God for ever and ever. Amen.
And one of the Elders answered, saying unto me, What are these which are arrayed in white robes? and when came they?
And I said unto him, Sir, thou knowest.
And he said to me, These are they which came out of the great tribulation, and have washed their robes, and made them white in the blood of the Lamb. Therefore are they before the Throne of God and serve Him day and night in His Temple: and He sitteth on the Throne shall dwell among them.
They shall hunger no more, neither thirst any more: neither shall the light on them, nor any heat.
For the Lamb which is in the midst of the Throne shall feed them, and shall lead them unto living fountains of water: and God shall wipe away all tears from their eyes."