Judah shall be saved, and Israel shall dwell safely. — The true King shall reign over a re-united people. The Ten Tribes of the Northern Kingdom, as well as the two of the Southern, should find in Him deliverance and peace.
Whereby he shall be called. — Literally, whereby one shall call him, the indefinite, almost impersonal active having the force of the English passive.
The Lord our Righteousness. — It is significant that in Jeremiah 33:16 the same name is given to Jerusalem. There it is clearly not, in logical language, the predicate of the city, but that which she takes as her watchword, and blazons, as it were, on her banner; and we cannot consistently press more than that meaning here. So in Ezekiel 48:35 the new name of Jerusalem is “Jehovah-shammah” (= the Lord is there). So in Exodus 17:15 Moses calls the altar which he builds “Jehovah-nissi” (= the Lord is my banner). The interpretation which sees in the words (1) the identification of the Messianic King with Jehovah, the Eternal, and (2) the doctrine of imputed righteousness, must accordingly be regarded as one of the applications of the words rather than their direct meaning. That meaning would seem to be that the King, the righteous Branch, will look to Jehovah as giving and working righteousness. Some commentators, indeed, refer the pronoun “he” to Israel, and not to the righteous Branch. We cannot forget that, at the very time when Jeremiah uttered this prophecy, a king was on the throne whose name (Zedekiah = righteous is Jehovah) implied the same thought. His reign had been a miserable failure, and the prophet looks forward to a time when the ideal, which was then far off, should at last be realised. If with many critics we refer the prediction to the reign of Jehoiakim (see Note on Jeremiah 23:1), we might almost see in Mattaniah’s adoption of the new name a boast that he was about to fulfil it. The Christ, we may say, answered to the name, not as being Himself one with Jehovah, though He was that, but as doing the Father’s will, and so fulfilling all righteousness (comp. Matthew 3:15).