2 Kings 20:8

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.”