2 Kings 20:8-10

New Catholic Bible

⁸ Hezekiah said to Isaiah, “What is the sign that the Lord will heal me, and on the day after tomorrow I will go up into the temple of the Lord?” 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.”