Matthew 17:2

17:2 And he was transfigured before them. His face shone like the sun, and his clothes became white as light.

Mark 9:2-3

The Transfiguration

9:2 Six days later Jesus took with him Peter, James, and John and led them alone up a high mountain privately. And he was transfigured before them, 9:3 and his clothes became radiantly white, more so than any launderer in the world could bleach them.

Luke 9:29

9:29 As he was praying, the appearance of his face was transformed, and his clothes became very bright, a brilliant white.