Melachim Bais 20:6

6 And I will add unto thy days fifteen shanah; and I will save thee and this city out of the palm of Melech Asshur (Assyria); and I will defend this city for Mine Own sake, and for the sake of Dovid Avdi.

Melachim Bais 20:6 Meaning and Commentary

And I will add unto thy days fifteen years,....See Gill on "Isa 38:5"

and I will deliver thee, and this city, out of the hand of the king of Assyria; by which it appears that this sickness and recovery were before the destruction of the Assyrian army:

and I will defend this city for mine own sake, and for my servant David's sake: for the sake of his honour and glory in the temple, and the service of it, that were in Jerusalem, and for the sake of his promise to David and his seed.

Melachim Bais 20:6 In-Context

4 And it came to pass, before Yeshayah was gone out from the middle courtyard, that the Devar Hashem came to him, saying,

5 Shuv (return), and say to Chizkiyahu (Hezekiah) the Nagid Ami, Thus saith Hashem Elohei Dovid Avicha, I have heard thy tefillah, I have seen thy tears; hineni, I will heal thee; on Yom HaShelishi thou shalt go up unto the Beis Hashem.

6 And I will add unto thy days fifteen shanah; and I will save thee and this city out of the palm of Melech Asshur (Assyria); and I will defend this city for Mine Own sake, and for the sake of Dovid Avdi.

7 And Yeshayah said, Take a develet te’enim. And they took and laid it on the shechin (boil, inflamed spot) and he recovered [See Isaiah 38:21].

8 And Chizkiyahu (Hezekiah) said unto Yeshayah, What shall be the Ot (Sign) that Hashem will heal me, and that I shall go up into the Beis Hashem on the Yom HaShelishi?