2 Kings 20:5-6

5“Go back and tell Hezekiah the leader of My people, ‘Thus says the Lord, the God of David your father (ancestor): “I have heard your prayer, I have seen your tears. Behold, I am healing you; on the third day you shall go up to the house of the Lord.

6I will add fifteen years to your life and save you and this city [Jerusalem] from the hand of the king of Assyria; and I will protect this city for My own sake and for My servant David’s sake.” ’ ”