Exodus 19:10-12

Amplified Bible, Classic Edition

¹⁰ And the Lord said to Moses, Go and sanctify the people [set them apart for God] today and tomorrow, and let them wash their clothes

¹¹ And be ready by the third day, for the third day the Lord will come down upon Mount Sinai [in the cloud] in the sight of all the people.

¹² And you shall set bounds for the people round about, saying, Take heed that you go not up into the mountain or touch the border of it. Whoever touches the mountain shall surely be put to death.