2 Kings 20:9-11

9Isaiah said, “1This shall be the sign to you from the Lord, that the Lord will perform the word that He has spoken: shall the shadow go forward ten steps or go back ten steps?” 10So Hezekiah said, “It is easy for the shadow to decline ten steps; no, but have the shadow turn backward ten steps.” 11Then Isaiah the prophet called out to the Lord, and 2He brought the shadow on the 3stairway back ten steps by which it had gone down on the 4stairway of Ahaz.