2 Kings 20:8-10

Darby Translation

⁸ And Hezekiah said to Isaiah, What [shall be] the sign that Jehovah will heal me, and that I shall go up into the house of Jehovah the third day?

⁹ And Isaiah said, This [shall be] the sign to thee from Jehovah, that Jehovah will do the thing that he hath spoken: shall the shadow go forward ten degrees, or go back ten degrees?

¹⁰ And Hezekiah said, It is a light thing for the shadow to go down ten degrees: no, but let the shadow return backward ten degrees.