2 Kings 20:6-8

New Revised Standard Version, Anglicised

⁶ I will add fifteen years to your life. I will deliver you and this city out of the hand of the king of Assyria; I will defend this city for my own sake and for my servant David’s sake.’ ⁷ Then Isaiah said, ‘Bring a lump of figs. Let them take it and apply it to the boil, so that he may recover.’

⁸ Hezekiah said to Isaiah, ‘What shall be the sign that the Lord will heal me, and that I shall go up to the house of the Lord on the third day?’