2 Kings 20:9-11

New Catholic Bible

⁹ Isaiah answered, “This is the sign that you will receive from the Lord that the Lord is going to do what he said: shall the shade climb up ten stairs, or go down ten stairs?”

¹⁰ Hezekiah answered, “It is too easy for the shade to go down ten stairs. No, let the shade go back up ten stairs.”

¹¹ Isaiah the prophet cried out to the Lord, and he brought the shade back up the ten stairs that it had gone down on the stairway of Ahaz.