2 Kings 20:7-8

7Then Isaiah said, ‘Take some figs to make a medicine.’ So the king's servants did what Isaiah had said. They put the medicine on Hezekiah's boil. He became well again.

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?’