KJV: And it came to pass, when Moses came down from mount Sinai with the two tables of testimony in Moses' hand, when he came down from the mount, that Moses wist not that the skin of his face shone while he talked with him.
NASB: It came about when Moses was coming down from Mount Sinai (and the two tablets of the testimony were in Moses' hand as he was coming down from the mountain), that Moses did not know that the skin of his face shone because of his speaking with Him.
KJV: But when Moses went in before the LORD 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.
NASB: But whenever Moses went in before the LORD to speak with Him, he would take off the veil until he came out; and whenever he came out and spoke to the sons of Israel what he had been commanded,