Exodus 19:10-12

21st Century King James Version

¹⁰ And the Lord said unto Moses, “Go unto the people and sanctify them today and tomorrow, and let them wash their clothes

¹¹ and be ready against the third day; for the third day the Lord will come down in the sight of all the people upon Mount Sinai.

¹² And thou shalt set bounds unto the people round about, saying, ‘Take heed to yourselves, that ye go not up into the mount or touch the border of it. Whosoever toucheth the mount shall be surely put to death.