Isaiah 38:6

4 Then came the word of the Yahuah to Isaiah, saying,

5 Go, and say to Hezekiah, Thus says the Yahuah, the Elohim of David your father, I have heard your prayer, I have seen your tears: behold, I will add unto your days fifteen years.

6 And I will deliver you and this city out of the hand of the king of Assyria: and I will defend this city.

7 And this a sign unto you from the Yahuah, that the Yahuah will do this thing that he has spoken;

8 Behold, I will bring again the shadow of the degrees, which is gone down in the sun dial of Ahaz, ten degrees backward. So the sun returned ten degrees, by which degrees it was gone down.