Exodus 19:10-12

New Revised Standard Version, Anglicised

¹⁰ the Lord said to Moses: ‘Go to the people and consecrate them today and tomorrow. Have them wash their clothes ¹¹ and prepare for the third day, because on the third day the Lord will come down upon Mount Sinai in the sight of all the people. ¹² You shall set limits for the people all around, saying, “Be careful not to go up the mountain or to touch the edge of it. Any who touch the mountain shall be put to death.