Exodus 19:20-22

Darby Translation

²⁰ And Jehovah came down on mount Sinai, on the top of the mountain; and Jehovah called Moses to the top of the mountain, and Moses went up.

²¹ And Jehovah said to Moses, Go down, testify to the people that they break not through to Jehovah to gaze, and many of them perish.

²² And the priests also, who come near to Jehovah, shall hallow themselves, lest Jehovah break forth on them.