Exodus 34:28-30 New Revised Standard Version (NRSV)
28 He was there with the Lord forty days and forty nights; he neither ate bread nor drank water. And he wrote on the tablets the words of the covenant, the ten commandments.[a]
The Shining Face of Moses
29 Moses came down from Mount Sinai. As he came down from the mountain with the two tablets of the covenant[b] in his hand, Moses did not know that the skin of his face shone because he had been talking with God. 30 When Aaron and all the Israelites saw Moses, the skin of his face was shining, and they were afraid to come near him.