Panim El Panim Related Sources

“But…” He said, “you cannot see My face, for man may not see Me and live.”

So Moses came down from Mount Sinai. And as Moses came down form the mountain bearing the two tablets of the Pact,
Moses was not aware that the skin of his face was radiant, since he had spoken with Him.
Aaron and all the Israelites saw that the skin of Moses’ face was radiant; and they shrank from coming near him.

The LORD would speak to Moses face to face, as one man speaks to another.
And he would then return to the camp; but his attendant, Joshua son of Nun, a youth, would not stir out of the Tent.