Exodus 19:23-25

New Catholic Bible

²³ Moses said to the Lord, “The people cannot climb up Mount Sinai, for you yourself have warned us saying, ‘Establish a boundary around the mountain and declare it to be holy.’ ”

²⁴ The Lord told him, “Go, descend, then come back up with Aaron. But the priests and the people are not to break through to climb up to the Lord. Otherwise, he will burst forth against them.”

²⁵ Moses went down and spoke to the people.