2 Kings 20:2-7

Then he turned his face to the wall and prayed to the LORD, saying, “Remember now, O LORD, I beseech You, how I have walked before You in truth and with a whole heart and have done what is good in Your sight.” And Hezekiah wept bitterly. Before Isaiah had gone out of the middle court, the word of the LORD came to him, saying, “Return and say to Hezekiah the leader of My people, ‘Thus says the LORD, the God of your father David, “I have heard your prayer, I have seen your tears; behold, I will heal you. On the third day you shall go up to the house of the LORD. I will add fifteen years to your life, and I will deliver you and this city from the hand of the king of Assyria; and I will defend this city for My own sake and for My servant David’s sake.” ’ ” Then Isaiah said, “Take a cake of figs.” And they took and laid it on the boil, and he recovered.