with both the Levites and the singing men, that is, those who were under Asaph, and those who were under Heman, and those who were under Jeduthun, with their sons and brothers, clothed in fine linen, sounded out with cymbals, and psalteries, and harps, standing toward the eastern side of the altar. And with them were one hundred twenty priests, sounding out with trumpets.
I watched until thrones were set up, and the ancient of days sat down. His garment was radiant like snow, and the hair of his head like clean wool; his throne was flames of fire, its wheels had been set on fire.
And I said to him, "My lord, you know." And he said to me: "These are the ones who have come out of the great tribulation, and they have washed their robes and have made them white by the blood of the Lamb.