And I said unto him, Sir, you know. And he said to me, These are they who came out of the great tribulation, and have washed their robes, and made them white in the blood of the Lamb.
All Commentaries on Revelation 7:14 Go To Revelation 7
Tertullian of Carthage
AD 220
For yet again a countless throng are revealed, clothed in white and distinguished by palms of victory, celebrating their triumph doubtless over Antichrist, since one of the elders says, "These are they who come out of that great tribulation, and have washed their robes, and made them white in the blood of the Lamb."