John Gill Commentary Isaiah 37:32

"For out of Jerusalem shall go forth a remnant, and out of mount Zion they that shall escape. The zeal of Jehovah of hosts will perform this." — Isaiah 37:32 (ASV)

For out of Jerusalem shall go forth a remnant The Targum is,``the rest of the righteous;'' the same as before; who, when the city should be free from the enemy, would go out of it, and return to their former settlements, in the several parts of Judea; a type of those who went out of Jerusalem with the Gospel of Christ, and spread it not only in Judea, but in the Gentile world:

and they that escape out of Mount Zion ; the same persons, differently described; some of whom were in the city of Jerusalem, and others in the fort of Zion, but departed from hence when the siege was broke up. The Targum is,``and the escaped of them that confirm the law out of Mount Zion;'' see (Isaiah 2:3) :

the zeal of the Lord of hosts shall do this : his concern for his own honour and glory, and his great love to his people, shall engage him to perform all that is here promised and foretold. The Targum is,``by the word of the Lord of hosts this shall be done.''