Exodus 19:21-23

New Century Version

²¹ The Lord said to Moses, “Go down and warn the people that they must not force their way through to see me. If they do, many of them will die. ²² Even the priests, who may come near me, must first prepare themselves. If they don’t, I, the Lord, will punish them.”

²³ Moses told the Lord, “The people cannot come up on Mount Sinai, because you yourself told us, ‘Set a limit around the mountain, and set it apart as holy.’”