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.

For out of Jerusalem shall go forth a remnant, and out of mount Zion they that shall escape: the zeal of Jehovah shall perform this.

For out of Jerusalem shall go forth a remnant, and that which shall be saved out of mount Sion: the zeal of the Lord of hosts shall do this.

For out of Jerusalem shall go forth a remnant, and they that escape from mount Zion: the zeal of the LORD of hosts shall do this.

For from Jerusalem those who have been kept safe will go out, and those who are still living will go out of Mount Zion: by the fixed purpose of the Lord of armies this will be done.

Indeed, a remnant shall go forth from Jerusalem, and what may be saved shall go forth from mount Zion. The zeal of the Lord of hosts shall accomplish this.

Out of Jerusalem shall go forth a remnant - The Jews shall be so multiplied as not only to fill Jerusalem, but all the adjacent country.
And they that escape out of Mount Zion - Some think that this refers to the going forth of the apostles to the Gentile world, and converting the nations by the preaching of the Gospel.

For out of Jerusalem shall go forth a remnant, and they that escape out of mount Zion: the (x) 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.

Go forth - That handful of Jews who were now gathered together, and shut up in Jerusalem, shall go out of their several habitations, and by my singular blessing increase exceedingly. The zeal - Although when you reflect upon yourselves, and consider either your present fewness, and weakness, or your great unworthiness, this may seem too great a blessing for you to expect; yet God will do it from the zeal which he hath, both for his own name, and for the good of his undeserving people.