Exodus 19:20 YLT

¹⁸  and mount Sinai 'is' wholly a smoke from the presence of Jehovah, who hath come down on it in fire, and its smoke goeth up as smoke of the furnace, and the whole mount trembleth exceedingly;

¹⁹  and the sound of the trumpet is going on, and very strong; Moses speaketh, and God doth answer him with a voice.

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.'