2 Kings 20:9-11

20:9 Isaiah replied, “This is your sign from the Lord confirming that the Lord will do what he has said. Do you want the shadow to move ahead ten steps or to go back ten steps?” 20:10 Hezekiah answered, “It is easy for the shadow to lengthen ten steps, but not for it to go back ten steps.” 20:11 Isaiah the prophet called out to the Lord, and the Lord made the shadow go back ten steps on the stairs of Ahaz.