Exodus 34:29-35

29 It happened, when Moses came down from Mount Sinai with the two tablets of the testimony in Moses' hand, when he came down from the mountain, that Moses didn't know that the skin of his face shone by reason of his speaking with him.  30 When Aaron and all the children of Israel saw Moses, behold, the skin of his face shone; and they were afraid to come near him.  31 Moses called to them, and Aaron and all the rulers of the congregation returned to him; and Moses spoke to them.  32 Afterward all the children of Israel came near, and he gave them all of the commandments that Yahweh had spoken with him on Mount Sinai.  33 When Moses was done speaking with them, he put a veil on his face.  34 But when Moses went in before Yahweh to speak with him, he took the veil off, until he came out; and he came out, and spoke to the children of Israel that which he was commanded.  35 The children of Israel saw Moses' face, that the skin of Moses' face shone: and Moses put the veil on his face again, until he went in to speak with him.

2 Corinthians 3:12-18

12 Having therefore such a hope, we use great boldness of speech,  13 and not as Moses, who put a veil on his face, that the children of Israel wouldn't look steadfastly on the end of that which was passing away.  14 But their minds were hardened, for until this very day at the reading of the old covenant the same veil remains, because in Christ it passes away.  15 But to this day, when Moses is read, a veil lies on their heart.  16 But whenever one turns to the Lord, the veil is taken away.  17 Now the Lord is the Spirit and where the Spirit of the Lord is, there is liberty.  18 But we all, with unveiled face beholding as in a mirror the glory of the Lord, are transformed into the same image from glory to glory, even as from the Lord, the Spirit.