The prophecy of Jeremiah, written about 600 years B.C., is foretelling the eventual judgment of southern Israel, Judah. The Northern tribes had already been sent into captivity. Babylon's assault was pending.
Throughout the prophecy, Jeremiah includes phrases of hope -- hope of a restoration. But none is as clear as is recorded in Jeremiah 23:5–6 (ESV)
5 “Behold, the days are coming, declares the Lord, when I will raise up for David a righteous Branch, and he shall reign as king and deal wisely, and shall execute justice and righteousness in the land. 6 In his days Judah will be saved, and Israel will dwell securely. And this is the name by which he will be called: ‘The Lord is our righteousness.’
There are some expositors that choose to leave the time of the prophecy's fulfillment as open. "The expression days are coming is very general and has no particular time reference." [1] There are others who are adamant that this prophecy will be fulfilled in a physical, temporal Millennial reign. For example: This is referring to "Israel’s regathering and the righteous Branch will occur during the millennial reign following the Great Tribulation." [2]
I believe "the days" refer to the time between Christ's advent and His Second Coming. I also believe that the time stamp is clear. I hold to that belief for 3 reasons:
#1. The formula "Behold the days".
In this chapter, Jeremiah uses that phrase twice (v5 and v7). He will use it again in the well-known chapter on the New Covenant. ““Behold, the days are coming, declares the Lord, when I will make a new covenant with the house of Israel and the house of Judah, not like the covenant that I made with their fathers on the day when I took them by the hand to bring them out of the land of Egypt, my covenant that they broke, though I was their husband, declares the Lord.” (Jeremiah 31:31–32, ESV)
The writer to the Hebrews in chapters 8:8bff and 10:15 clearly applies that formula to the Christian Church. In classic Biblical hermeneutics, we interpret the Old by the New. The author to the book of Hebrews would view Jeremiah's prophecy as applying to the Church, the true offspring of Abraham, all those who have faith in Jesus Christ. Just as the New Covenant was inaugurated by Jesus, so the Messianic reign was inaugurated at His advent.
#2. The Branch of David.
The second time stamp in this passage is the reference to the Branch of David. Thompson comments: "The metaphor is of a shoot (ṣemaḥ) bursting forth from the Davidic tree (i.e., the dynasty), which, though cut off, is not dead. English versions have generally translated the word as Branch. In postexilic times the term became the classic technical one for the expected ideal king (Zech. 3:8; 6:12) [3].
No one disputes that the Branch, or better, the Shoot, is referring to Jesus Christ, the expected Messiah. Jeremiah likely got that hint from Isaiah who prophesied 100 years before. “There shall come forth a shoot from the stump of Jesse, and a branch from his roots shall bear fruit. And the Spirit of the Lord shall rest upon him, the Spirit of wisdom and understanding, the Spirit of counsel and might, the Spirit of knowledge and the fear of the Lord.” (Isaiah 11:1–2, ESV). Jesus Himself citing a parallel passage (“The Spirit of the Lord God is upon me, because the Lord has anointed me to bring good news to the poor; he has sent me to bind up the brokenhearted, to proclaim liberty to the captives, and the opening of the prison to those who are bound;” (Isaiah 61:1, ESV) affirmed that this was about Him. (Luke 4:18-19). Jesus believed that He was the One prophesied and He was currently engaged in the ministry foretold.
#3. The Salvation of Israel.
In Romans 11:26 (ESV), Paul clearly tells us that he is thinking of the Old Testament restorative literature when he writes, "26 And in this way all Israel will be saved, as it is written, “The Deliverer will come from Zion, he will banish ungodliness from Jacob”. Certainly, when the audience read "in this way all Israel will be saved" they must have thought of: “In his days Judah will be saved, and Israel will dwell securely. And this is the name by which he will be called: ‘The Lord is our righteousness.’” (Jeremiah 23:6, ESV)
Paul was writing of contemporary things. He describes how God has not rejected Israel, but in fact has a glorious plan of salvation based upon His electing mercies. "In this way all Israel" will be saved. In other words, what is happening right now, as it happened to him, is how Israel will be saved.
Conclusion
Surely the authorial intent of the prophecy of Jeremiah 23:5-6, is to point us to the Coming of the Messiah at His birth and His ministry throughout the last days until His Second Return. “. . . Then comes the end, when he delivers the kingdom to God the Father after destroying every rule and every authority and power. For he must reign until he has put all his enemies under his feet.” (1 Corinthians 15:23–25, ESV)
So, it was with great cause and abundant joy that the father of John the Baptist would exclaim:
". . .“Blessed be the Lord God of Israel, for he has visited and redeemed his people and has raised up a horn of salvation for us in the house of his servant David, as he spoke by the mouth of his holy prophets from of old, that we should be saved from our enemies and from the hand of all who hate us; to show the mercy promised to our fathers and to remember his holy covenant, the oath that he swore to our father Abraham, to grant us that we, being delivered from the hand of our enemies, might serve him without fear, in holiness and righteousness before him all our days.” (Luke 1:67–75, ESV)
To God be the Glory.
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1. Thompson, J. A. (1980). The Book of Jeremiah (p. 489). Wm. B. Eerdmans Publishing Co.
3. Thompson, J. A. (1980). The Book of Jeremiah (p. 489). Wm. B. Eerdmans Publishing Co.