Albert Barnes 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)

Shall go forth a remnant - The word ‘remnant’ means that which is left; and does not of necessity imply that it should be a small portion. No doubt a part of the Jews were destroyed in the invasion of Sennacherib, but the assurance is here given that a portion of them would remain in safety, and that they would constitute that from which the future prosperity of the state would arise.

And they that escape - Margin, ‘The escaping,’ that is, the remnant.

The zeal - (See the note at Isaiah 9:7).