Exodus 19:25

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

Moses 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.’”

The 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.”