Exod.19.11

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.

Exod.19.11

so that on the third day they'll be fully prepared, because on the third day GOD will come down on Mount Sinai and make his presence known to all the people.

Exod.19.11

and be ready by the third day, because on that day the LORD will come down on Mount Sinai in the sight of all the people.

Exod.19.11

And let them be ready for the third day. For on the third day the LORD will come down upon Mount Sinai in the sight of all the people.