The LORD of hosts hath sworn, saying, Surely as I have thought, so shall it come to pass; and as I have purposed, so shall it stand:

Wesley's Notes

14:24 Saying - This verse does not only concern Babylon's destruction, but also the overthrow of Sennacherib and the Assyrian host, which was a pledge of the destruction of the city and empire of Babylon.

Jamieson-Fausset-Brown Bible Commentary

Isa 14:24-27. Confirmation of This by the Hereforetold Destruction of the Assyrians under Sennacherib;

a pledge to assure the captives in Babylon that He who, with such ease, overthrew the Assyrian, could likewise effect His purpose as to Babylon. The Babylonian king, the subject of this prediction, is Belshazzar, as representative of the kingdom (Da 5:1-31).

Isa 14:24-27. A Fragment as to the Destruction of the Assyrians under Sennacherib.

This would comfort the Jews when captives in Babylon, being a pledge that God, who had by that time fulfilled the promise concerning Sennacherib (though now still future), would also fulfil His promise as to destroying Babylon, Judah's enemy.

24. In this verse the Lord's thought (purpose) stands in antithesis to the Assyrians' thoughts (Isa 10:7). (See Isa 46:10, 11; 1Sa 15:29; Mal 3:6).

Matthew Henry's Concise Commentary

14:24-27 Let those that make themselves a yoke and a burden to God's people, see what they are to expect. Let those that are the called according to God's purpose, comfort themselves, that whatever God has purposed, it shall stand. The Lord of hosts has purposed to break the Assyrian's yoke; his hand is stretched out to execute this purpose; who has power to turn it back? By such dispensations of providence, the Almighty shows in the most convincing manner, that sin is hateful in his sight.