Exodus 19:10
And the Yahuah said unto Moses, Go unto the people, and sanctify them to day and to morrow, and let them wash their clothes,
ā The Restored Word Bible
Context
8 And all the people answered together, and said, All that the Yahuah has spoken we will do. And Moses returned the words of the people unto the Yahuah.
9 And the Yahuah said unto Moses, Lo, I come unto you in a thick cloud, that the people may hear when I speak with you, and believe you for ever. And Moses told the words of the people unto the Yahuah.
10 And the Yahuah said unto Moses, Go unto the people, and sanctify them to day and to morrow, and let them wash their clothes,
11 And be ready against the third day: for the third day the Yahuah will come down in the sight of all the people upon mount Sinai.
12 And you shall set bounds unto the people round about, saying, Take heed to yourselves, go up into the mount, or touch the border of it: whosoever toucheth the mount shall be surely put to death: