Exodus 19:21-23

Living Bible

²¹ But the Lord told Moses, “Go back down and warn the people not to cross the boundaries. They must not come up here to try to see God, for if they do, many of them will die. ²² Even the priests on duty^[a] must sanctify themselves, or else I will destroy them.”

²³ “But the people won’t come up into the mountain!” Moses protested. “You told them not to! You told me to set boundaries around the mountain and to declare it off limits because it is reserved for God.”