Exodus 34:33--35:1

34:33 When Moses finished speaking with them, he would put a veil on his face. 34:34 But when Moses went in before the Lord to speak with him, he would remove the veil until he came out. Then he would come out and tell the Israelites what he had been commanded. 34:35 When the Israelites would see the face of Moses, that the skin of Moses’ face shone, Moses would put the veil on his face again, until he went in to speak with the Lord.

Sabbath Regulations

35:1 Moses assembled the whole community of the Israelites and said to them, “These are the things that the Lord has commanded you to do.