Melachim Bais 20:9-11

Orthodox Jewish Bible

⁹ And Yeshayah said, This Ot (Sign) shalt thou have from Hashem, that Hashem will do the thing that He hath spoken: shall the tzel (shadow) go forward eser ma’alot (ten steps), or go backward eser ma’alot?

¹⁰ And Chizkiyahu (Hezekiah) answered, It is a simple matter for the tzel to go forward eser ma’alot; no, but let the tzel return backward eser ma’alot.

¹¹ And Yeshayah HaNavi cried out unto Hashem; and He brought the tzel (shadow) eser ma’alot backward, by which it had gone on the ma’alot Achaz (sundial of Ahaz).