Exodus 19:9 DBY

⁷  And Moses came and called the elders of the people, and laid before the mall these words which Jehovah had commanded him.

⁸  And all the people answered together, and said, All that Jehovah has spoken will we do! And Moses brought the words of the people back to Jehovah.

⁹  And Jehovah said to Moses, Lo, I will come to thee in the cloud's thick darkness, that the people may hear when I speak with thee, and believe thee also for ever. And Moses told the words of the people to Jehovah.

¹⁰  And Jehovah said to Moses, Go to the people, and hallow them to-day and to-morrow, and let them wash their clothes;

¹¹  and let them be ready for the third day; for on the third day Jehovah will come down before the eyes of all the people on mount Sinai.