Jerome
Catena Aurea · Matthäusevangelium 17
While he yet spake, behold, a bright cloud overshadowed them: and behold a voice out of the cloud, which said, This is my beloved Son, in whom I am well pleased; hear ye him. And when the disciples heard it, they fell on their face, and were sore afraid. And Jesus came and touched them, and said, Arise, and be not afraid. And when they had lifted up their eyes, they saw no man, save Jesus only. And as they came down from the mountain, Jesus charged them, saying, Tell the vision to no man, until the Son of man be risen again from the dead.
While they thought only of an earthly tabernacle of boughs or tents, they are overshadowed by the covering of a bright cloud; While he yet spake, there came a bright cloud and overshadowed them. (Exod. 19:9, 16.)