2 Kings 20:8-10

Revised Standard Version

⁸ And Hezeki′ah 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?” ⁹ And Isaiah said, “This is 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?” ¹⁰ And Hezeki′ah answered, “It is an easy thing for the shadow to lengthen ten steps; rather let the shadow go back ten steps.”