2 Kings 20:9-11

9And Isaiah said, This shall be the sign unto thee from Jehovah, that Jehovah will do the thing that he hath spoken: shall the shadow go forward ten steps, or go back ten steps? 10And Hezekiah answered, It is a light thing for the shadow to decline ten steps: nay, but let the shadow return backward ten steps. 11And Isaiah the prophet cried unto Jehovah; and he brought the shadow ten steps backward, by which it had gone down on the dial of Ahaz.