Exodus 34:29-35

29And when Moses came down from Mount Sinai with the two tablets of the Testimony in his hands, he was unaware that his face had become radiant from speaking with the LORD. 30Aaron and all the Israelites looked at Moses, and behold, his face was radiant. And they were afraid to approach him.

31But Moses called out to them; so Aaron and all the leaders of the congregation returned to him, and Moses spoke to them. 32And after this all the Israelites came near, and Moses commanded them to do everything that the LORD had told him on Mount Sinai.

33When Moses had finished speaking with them, he put a veil over his face. 34But whenever Moses went in before the LORD to speak with Him, he would remove the veil until he came out. And when he came out, he would tell the Israelites what he had been commanded, 35and the Israelites would see that the face of Moses was radiant. So Moses would put the veil back over his face until he went in to speak with the LORD.