Exodus 34:28–35

²⁸Moses was there with the Lord 40 days and 40 nights without food or water. He wrote on the tablets the words of the promise, the ten commandments. 

Moses Returns to the People

²⁹Moses came down from Mount Sinai, carrying the two tablets with God’s words on them. His face was shining from speaking with the Lord, but he didn’t know it. 

³⁰When Aaron and all the Israelites looked at Moses and saw his face shining, they were afraid to come near him. ³¹Moses called to them, so Aaron and all the leaders of the community came back to him. Then Moses spoke to them. ³²After that, all the other Israelites came near him, and he commanded them to do everything the Lord told him on Mount Sinai. ³³When Moses finished speaking to them, he put a veil over his face. ³⁴But whenever Moses went into the Lord’s presence to speak with him, he took off the veil until he came out. Whenever he came out and told the Israelites what he had been commanded, ³⁵they would see that Moses’ face was shining. Then Moses would put the veil back on until he went in again to speak with the Lord.