Exodus 27:21

27:21 In the tent of meeting outside the curtain that is before the testimony, Aaron and his sons are to arrange it from evening to morning before the Lord. This is to be a lasting ordinance among the Israelites for generations to come.

Exodus 34:29

The Radiant Face of Moses

34:29 Now when Moses came down from Mount Sinai with the two tablets of the testimony in his hand – when he came down from the mountain, Moses did not know that the skin of his face shone while he talked with him.