Exodus 19:11

11 and be ready by the day after tomorrow. On that day the LORD will come down on Mount Sinai as all the people watch.

Exodus 19:11 Meaning and Commentary

Exodus 19:11

And be ready against the third day
Not the third day of the month, but the third day from hence, this being the fourth, and the morrow the fifth, and the third day, the day following that, the sixth, on which day it is generally agreed by the Jews that the law was given, (See Gill on Exodus 19:16)

for the third day the Lord will come down in the sight of all the
people upon Mount Sinai;
which must be understood, consistent with his omnipresence, and is only expressive of some visible display of his power, and of some sensible token of his presence to the people; he was now upon it in the pillar of cloud, but then he would appear in another manner, and descend in a thick cloud and fire, which all the people would see, though they could not see the similitude of anything in it.

Exodus 19:11 In-Context

9 The LORD said to Moses, "I am coming to you in a storm cloud so that the people will hear me speaking with you and will always believe you." Moses told the LORD what the people had said.

10 So the LORD said to Moses, "Go to the people, and tell them they have two days to get ready. They must set themselves apart as holy. Have them wash their clothes

11 and be ready by the day after tomorrow. On that day the LORD will come down on Mount Sinai as all the people watch.

12 Mark off a boundary around the mountain for the people, and tell them not to go up the mountain or even touch it. Those who touch the mountain must be put to death.

13 No one should touch them. They must be stoned or shot with arrows. No matter whether it's an animal or a person, it must not live. The people may go up the mountain [only] when the ram's horn sounds a long blast."