Albert Barnes Commentary Isaiah 44:26

"that confirmeth the word of his servant, and performeth the counsel of his messengers; that saith of Jerusalem, She shall be inhabited; and of the cities of Judah, They shall be built, and I will raise up the waste places thereof;" — Isaiah 44:26 (ASV)

That confirmeth the word of his servant - Probably the word ‘servant’ here is to be taken in a collective sense, referring to the prophets in general who had foretold the return of the Jews to their own land, and the rebuilding of Jerusalem. Or it may be that the prophet refers more particularly to himself as having made a full prediction of this event. The parallel expression, ‘his messengers,’ however, is in the plural number, and thus it becomes probable that the word here refers to the prophets collectively. The idea is that it was a characteristic of God to establish the words of his servants the prophets, and that their predictions regarding the return from the captivity would especially be fulfilled.

The counsel of his messengers - The prophets whom he had sent to announce future events, and to give counsel and consolation to the nation.

That saith to Jerusalem - Jerusalem is here supposed to be lying in ruins, and the people to be in captivity in Babylon. In this situation, God is represented as addressing desolate Jerusalem, and saying that it should be inhabited again, and that the cities of Judah should be rebuilt.

The decayed places - Margin, ‘Wastes.’ No land, probably, was ever more completely desolated than the land of Judea when its inhabitants were carried to Babylon.