Exodus 34:29-31

Young's Literal Translation

²⁹ And it cometh to pass, when Moses is coming down from mount Sinai (and the two tables of the testimony [are] in the hand of Moses in his coming down from the mount), that Moses hath not known that the skin of his face hath shone in His speaking with him,

³⁰ and Aaron seeth -- all the sons of Israel also -- Moses, and lo, the skin of his face hath shone, and they are afraid of coming nigh unto him.

³¹ And Moses calleth unto them, and Aaron and all the princes in the company return unto him, and Moses speaketh unto them;