Thematic Bible: Those which came out of great tribulation

After these things I saw, and, behold, a great multitude, which none could number it, of all nations, and tribes, and peoples, and tongues, standing before the throne, and before the Lamb, having put round white robes, and palm trees in their hands; And crying with a great voice, saying, Salvation to our God sitting upon the throne, and to the Lamb. And all the angels stood round about the throne, and the elders and the four living creatures, and they fell before the throne upon their faces, and worshipped God, read more.
Saying, Amen: praise, and glory, and wisdom, and gratitude, and honour, and power, and strength, to our God for ever and ever. Amen. And one of the elders answered, saying to me, These having put round white robes, who are they? and whence came they And I said to him, Lord, thou knowest. And he said to me, These are they coming out of great pressure, and they washed their robes, and whitened their robes 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 sitting upon the throne will dwell among them. They shall hunger no more, nor thirst any more; nor should the sun fall upon them, neither any heat. For the Lamb in the midst of the throne shall feed them, and shall guide them to living fountains of water: and God shall wipe out every tear from their eyes.