2 Kings 20:5-6

5“Go back and tell Hezekiah the leader of My people that this is what the LORD, the God of your father David, says: ‘I have heard your prayer; I have seen your tears. I will surely heal you. On the third day from now you will go up to the house of the LORD. 6I will add fifteen years to your life. And I will deliver you and this city from the hand of the king of Assyria. I will defend this city for My sake and for the sake of My servant David.’”