And the LORD said to Moses, “Write these words; in accordance with these words I have made a covenant with you and with Israel.” And he was there with the LORD forty days and forty nights; he neither ate bread nor drank water. And he wrote upon the tables the words of the covenant, the ten commandments. When Moses came down from Mount Sinai, with the two tables of the testimony in his hand as he came down from the mountain, Moses did not know that the skin of his face shone because he had been talking with God. And when Aaron and all the people of Israel saw Moses, behold, the skin of his face shone, and they were afraid to come near him. But Moses called to them; and Aaron and all the leaders of the congregation returned to him, and Moses talked with them. And afterward all the people of Israel came near, and he gave them in commandment all that the LORD had spoken with him in Mount Sinai.
–Exodus 34:27-32