2 Kings 20:8

4Before Isaiah had gone out into the middle part of the city, the LORD’s word came to him, saying,

5“Turn back, and tell Hezekiah the prince of my people, ‘The LORD, the God of David your father, says, “I have heard your prayer. I have seen your tears. Behold, I will heal you. On the third day, you will go up to the LORD’s house.

6I will add to your days fifteen years. I will deliver you and this city out of the hand of the king of Assyria. I will defend this city for my own sake, and for my servant David’s sake.”’”

7Isaiah said, “Take a cake of figs.” They took and laid it on the boil, and he recovered.

8Hezekiah said to Isaiah, “What will be the sign that the LORD will heal me, and that I will go up to the LORD’s house the third day?”

9Isaiah said, “This will be the sign to you from the LORD, that the LORD will do the thing that he has spoken: should the shadow go forward ten steps, or go back ten steps?”

10Hezekiah answered, “It is a light thing for the shadow to go forward ten steps. No, but let the shadow return backward ten steps.”

11Isaiah the prophet cried to the LORD; and he brought the shadow ten steps backward, by which it had gone down on the sundial of Ahaz.

12At that time Berodach Baladan the son of Baladan, king of Babylon, sent letters and a present to Hezekiah, for he had heard that Hezekiah had been sick.