2 Kings 20:8-11

8And Hezekiah said to Isaiah, “What shall be the sign that the LORD will heal me, and that I shall go up to the house of the LORD on the third day?” 9And Isaiah said, “This shall be the sign to you from the LORD, that the LORD will do the thing that he has promised: shall the shadow go forward ten steps, or go back ten steps?” 10And Hezekiah answered, “It is an easy thing for the shadow to lengthen ten steps. Rather let the shadow go back ten steps.” 11And Isaiah the prophet called to the LORD, and he brought the shadow back ten steps, by which it had gone down on the steps of Ahaz.