'Third Day' in the Bible

“Go back and tell Hezekiah, the leader of My people, ‘This is what the Lord God of your ancestor David says: I have heard your prayer; I have seen your tears. Look, I will heal you. On the third day from now you will go up to the Lord’s temple.

Hezekiah had asked Isaiah, “What is the sign that the Lord will heal me and that I will go up to the Lord’s temple on the third day?”