Exodus 19:8-12 Catholic Public Domain Version (CPDV)

8. And all the people responded together: "Everything that the Lord has spoken, we shall do." And when Moses had related the words of the people to the Lord,

9. the Lord said to him: "Soon now, I will come to you in the mist of a cloud, so that the people may hear me speaking to you, and so that they may believe you continuously." Therefore, Moses reported the words of the people to the Lord,

10. who said to him: "Go to the people, and sanctify them today, and tomorrow, and let them wash their garments.

11. And let them be prepared on the third day. For on the third day, the Lord will descend, in the sight of all the people, over Mount Sinai.

12. And you will establish limits for the people all around, and you will say to them: 'Take care not to ascend to the mountain, and that you do not touch its parts. All who touch the mountain, shall die a death.'

Exodus 19