Exodus 34:29-30
The Radiant Face of Moses
34:29 Now when Moses came down from Mount Sinai with the two tablets of the testimony in his hand – when he came down from the mountain, Moses did not know that the skin of his face shone while he talked with him.
34:30 When Aaron and all the Israelites saw Moses, the skin of his face shone; and they were afraid to approach him.