Exodus 19:20-22

Young's Literal Translation

²⁰ And Jehovah cometh down on mount Sinai, unto the top of the mount, and Jehovah calleth for Moses unto the top of the mount, and Moses goeth up.

²¹ And Jehovah saith unto Moses, `Go down, protest to the people, lest they break through unto Jehovah to see, and many of them have fallen;

²² and also the priests who are coming nigh unto Jehovah do sanctify themselves, lest Jehovah break forth on them.'