Exodus 34:32-35

32And afterward all the children of Israel came nigh: and he gave them in commandment all that Yhwh had spoken with him in mount Sinai.

33And till Moses had done speaking with them, he put a vail on his face.

34But when Moses went in before Yhwh to speak with him, he took the vail off, until he came out. And he came out, and spake unto the children of Israel that which he was commanded.

35And the children of Israel saw the face of Moses, that the skin of Moses’ face shone: and Moses put the vail upon his face again, until he went in to speak with him.