2 Kings 20:5-6

5Return, and tell Hezekiah the captain of my people, Thus saith Jehovah, the 1God of David thy father: I have heard thy prayer, I have seen thy tears; behold, I will heal thee: on the third day thou shalt go up to the house of Jehovah;

6and I will add to thy days fifteen years; and I will deliver thee and this city out of the hand of the king of Assyria, and I will defend this city for mine own sake, and for my servant David's sake.