2 Kings 20:8-9

8Hezekiah had asked Isaiah, ‘What will show me that the Lord will make me well again? How will I know that I will go up to the Lord's temple on the third day from now?’

9Isaiah answered, ‘The Lord will do a miracle to show you that he will do what he has promised. Do you want the shadow on these stairs to move down ten steps? Or do you want the shadow to go back up ten steps?’