2 Kings 20:9-11

9Isaiah said, “1This shall be the sign to you from the Lord, that the Lord will do the thing that He has spoken: shall the shadow go forward ten steps or go back ten steps?” 10So Hezekiah 2answered, “It is easy for the shadow to decline ten steps; no, but let the shadow turn backward ten steps.” 11Isaiah the prophet cried to the Lord, and 3He brought the shadow on the 4stairway back ten steps by which it had gone down on the 5stairway of Ahaz.