Exodus 19:22

²⁰And the Lord came down upon Mount Sinai on the top of the mountain; and the Lord called Moses to the top of the mountain, and Moses went up.

²¹And God spoke to Moses, saying, Go down, and solemnly charge the people, lest at any time they draw nigh to God to gaze, and a multitude of them fall.

— Exodus 19:22 —

²³And Moses said to God, The people will not be able to approach to the mount of Sinai, for thou hast solemnly charged us, saying, Set bounds to the mountain and sanctify it.

²⁴And the Lord said to him, Go, descend, and come up thou and Aaron with thee; but let not the priests and the people force their way to come up to God, lest the Lord destroy some of them.