Melachim Bais 20:8-10

Orthodox Jewish Bible

⁸ And Chizkiyahu (Hezekiah) said unto Yeshayah, What shall be the Ot (Sign) that Hashem will heal me, and that I shall go up into the Beis Hashem on the Yom HaShelishi?

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.