Exodus 19:11, 20
Exodus 19:11 KJV
and be ready against the third day: for the third day the LORD will come down in the sight of all the people upon mount Sinai.
Exodus 19:20 KJV
And the LORD came down upon mount Sinai, on the top of the mount: and the LORD called Moses up to the top of the mount; and Moses went up.