Exodus 19:22

20The LORD came down on Mount Sinai, to the top of the mountain. The LORD called Moses to the top of the mountain, and Moses went up.

21The LORD said to Moses, “Go down, warn the people, lest they break through to the LORD to gaze, and many of them perish.

22Let the priests also, who come near to the LORD, sanctify themselves, lest the LORD break out on them.”

23Moses said to the LORD, “The people can’t come up to Mount Sinai, for you warned us, saying, ‘Set bounds around the mountain, and sanctify it.’”

24The LORD said to him, “Go down! You shall bring Aaron up with you, but don’t let the priests and the people break through to come up to the LORD, lest he break out against them.”