Exodus 19:11

⁹And the Lord said to Moses, Lo! I come to thee in a pillar of a cloud, that the people may hear me speaking to thee, and may believe thee forever: and Moses reported the words of the people to the Lord.

¹⁰And the Lord said to Moses, Go down and solemnly charge the people, and sanctify them today and tomorrow, and let them wash their garments.

— Exodus 19:11 —

¹²And thou shalt separate the people round about, saying, Take heed to yourselves that ye go not up into the mountain, nor touch any part of it: everyone that touches the mountain shall surely die.

¹³A hand shall not touch it, for everyone that touches shall be stoned with stones or shot through with a dart, whether beast or whether man, it shall not live: when the voices and trumpets and cloud depart from off the mountain, they shall come up on the mountain.