“The word that came to Jeremiah from the LORD, saying,

‘Thus speaketh the LORD God of Israel, saying, ‘Write thee all the words that I have spoken unto thee in a book. For, lo, the days come, saith the LORD, that I will bring again the captivity of My people Israel and Judah, saith the LORD: and I will cause them to return to the land that I gave to their fathers, and they shall possess it.’ And these are the words that the LORD spake concerning Israel and concerning Judah.

For thus saith the LORD; ‘We have heard a voice of trembling, of fear, and not of peace.

Ask ye now, and see whether a man doth travail with child? Wherefore do I see every man with his hands on his loins, as a woman in travail, and all faces are turned into paleness? Alas! for that day is great, so that none is like it: it is even the time of Jacob’s trouble; but he shall be saved out of it.

For it shall come to pass in that day, saith the LORD of Hosts, that I will break his yoke from off thy neck, and will burst thy bonds, and strangers shall no more serve themselves of him: but they shall serve the LORD their God, and David their king, whom I will raise up unto them.

Therefore fear thou not, O my servant Jacob, saith the LORD; neither be dismayed, O Israel: for, lo, I will save thee from afar, and thy seed from the land of their captivity; and Jacob shall return, and shall be in rest, and be quiet, and none shall make afraid. For I am with thee, saith the LORD, to save thee: though I make a full end of all nations whither I have scattered thee, yet will I not make a full end of thee: but I will correct thee in measure, and will not leave thee altogether unpunished.’ ” Jeremiah 30:1-11 (KJB)

God was not at all pleased with the nation of Israel.  He was sending them into captivity to bring out a people who were holy, and wholly given to Him, had a heart  for Him, His word, and were obedient to all that He commanded.

The above words of the prophecy have not yet been fully fulfilled. They will be at the end of Jacob’s trouble.

“David their King” is none other than the Lord Jesus Christ. They have had no king since the return from Babylon; with the exception of maybe puppet kings of Rome.

This should give every Christian assurance.  God is working in us as well to complete what He has began in us (Philippians 1:6).