When Moses finished speaking to them, he put a veil1 over his face.
References for Exodus 34:33
But whenever he entered the LORD's presence to speak with him, he removed the veil until he came out. And when he came out and told the Israelites what he had been commanded,
they saw that his face was radiant.2 Then Moses would put the veil back over his face until he went in to speak with the LORD.
References for Exodus 34:35