Charles Ellicott 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 confirms the word of his servant. —The parallelism of “servant” in the singular with “messengers” in the plural suggests the thought that the prophet is not speaking of himself, but of Israel, as the ideal “servant of the Lord,” the prophetic nation represented by the individual “messengers” or prophets. Compare as to the word Isaiah 42:19; Malachi 3:1, and that prophet’s own name (“my messenger”).