2 Kings 20:6-8

Young's Literal Translation

⁶ and I have added to thy days fifteen years, and out of the hand of the king of Asshur I deliver thee and this city, and have covered over this city for Mine own sake, and for the sake of David My servant.'

⁷ And Isaiah saith, `Take ye a cake of figs;' and they take and lay [it] on the boil, and he reviveth.

⁸ And Hezekiah saith unto Isaiah, `What [is] the sign that Jehovah doth give healing to me, that I have gone up on the third day to the house of Jehovah?'