Exodus 34:29-33

And it came to pass, when Moses came down from mount Sinai with the two tables of the testimony in Moses’ hand, when he came down from the mount, that Moses knew not that the skin of his face shone by reason of his speaking with him. And when Aaron and all the children of Israel saw Moses, behold, the skin of his face shone; and they were afraid to come nigh him. And Moses called unto them; and Aaron and all the rulers of the congregation returned unto him: and Moses spake to them. And afterward all the children of Israel came nigh: and he gave them in commandment all that Jehovah had spoken with him in mount Sinai. And when Moses had done speaking with them, he put a veil on his face.