2 Kings 20:6-8

Amplified Bible

⁶ I will add fifteen years to your life and save you and this city [Jerusalem] from the hand of the king of Assyria; and I will protect this city for My own sake and for My servant David’s sake.”’” ⁷ Then Isaiah said, “Bring a cake of figs. And they brought it and placed it on the [painful] inflammation, and he recovered.”

⁸ Hezekiah said to Isaiah, “What will be the sign that the Lord will [completely] heal me, and that I shall go up to the house of the Lord on the third day?”