Again, they saw a young man sitting on the right, because the Resurrection has nothing sinister in it. They also see him dressed in a long white robe; that robe is not from mortal fleece, but of living virtue, blazing with heavenly light, not of an earthly dye, as saith the Prophet, “Thou deckest thyself with light as with a garment;” [Ps 104:2] and of the just it is said, “Then shall the righteous shine forth as the sun.” [Matt 13:43]
Reproduced in full. Translation: Oxford 1841 (Newman), public domain (Public domain).
Also cites: Chrysologus