'Be Ready' in the Bible

and be ready by the third day, because on the third day the Lord will come down on Mount Sinai [in the cloud] in the sight of all the people.

He said to the people, “Be prepared for the third day; do not be intimate with a woman.”

So be ready by morning, and come up in the morning to Mount Sinai, and present yourself there to Me on the top of the mountain.