'Third Day' in the Bible

that they may 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.

And he said unto the people, "Be ready against the third day, and see that ye come not at your wives."

And the third day in the morning there was thunder, and lightning and a thick cloud upon the mount, and the voice of the horn waxed exceeding loud, and all the people that was in the host was afraid.