For a remnant will go forth from Jerusalem, and survivors from Mount Zion. The zeal of the LORD of Hosts will accomplish this.
We have here the gracious copious answer which God gave to Hezekiah's prayer. The message which he sent him by the same hand (Kg2 19:6, Kg2 19:7), one would think, was an answer sufficient to his prayer; but, that he might have strong consolation, he was encouraged by two immutable things, in which it was impossible for God to lie, Heb 6:18.
Commenting on 2 Kings 19:20-34
HEZEKIAH'S PRAYER. (2Ki. 19:14-34) Hezekiah received the letter . . . and went up into the house of the Lord--Hezekiah, after reading it, hastened into the temple, spread it in the childlike confidence of faith before the Lord, as containing taunts deeply affecting the divine honor, and implored deliverance from this proud defier of God and man.
Commenting on 2 Kings 19:14-34
For out of Jerusalem shall go forth a remnant, and they that escape out of mount Zion: the zeal of the LORD [of hosts] shall do this. (x) The love, that God has for his Church will overcome the counsels and enterprises of men.