1 Moreover the word of the LORD came unto Jeremiah the second time, while he was yet shut up in the court of the prison, saying, 2 Thus saith the LORD the maker thereof, the LORD that formed it, to establish it; the LORD is his name; 3 Call unto me, and I will answer thee, and shew thee great and mighty things, which thou knowest not. 4 For thus saith the LORD, the God of Israel, concerning the houses of this city, and concerning the houses of the kings of Judah, which are thrown down by the mounts, and by the sword; 5 They come to fight with the Chaldeans, but it is fill them with the dead bodies of men, whom I have slain in mine anger and in my fury, and for all whose wickedness I have hid my face from this city. 6 Behold, I will bring it health and cure, and I will cure them, and will reveal unto them the abundance of peace and truth. 7 And I will cause the captivity of Judah and the captivity of Israel to return, and will build them, as at the first. 8 And I will cleanse them from all their iniquity, whereby they have sinned against me; and I will pardon all their iniquities, whereby they have sinned, and whereby they have transgressed against me. 9 And it shall be to me a name of joy, a praise and an honour before all the nations of the earth, which shall hear all the good that I do unto them: and they shall fear and tremble for all the goodness and for all the prosperity that I procure unto it. 10 Thus saith the LORD; Again there shall be heard in this place, which ye say shall be desolate without man and without beast, even in the cities of Judah, and in the streets of Jerusalem, that are desolate, without man, and without inhabitant, and without beast, 11 The voice of joy, and the voice of gladness, the voice of the bridegroom, and the voice of the bride, the voice of them that shall say, Praise the LORD of hosts: for the LORD is good; for his mercy endureth for ever: and of them that shall bring the sacrifice of praise into the house of the LORD. For I will cause to return the captivity of the land, as at the first, saith the LORD. 12 Thus saith the LORD of hosts; Again in this place, which is desolate without man and without beast, and in all the cities thereof, shall be an habitation of shepherds causing their flocks to lie down. 13 In the cities of the mountains, in the cities of the vale, and in the cities of the south, and in the land of Benjamin, and in the places about Jerusalem, and in the cities of Judah, shall the flocks pass again under the hands of him that telleth them, saith the LORD. 14 Behold, the days come, saith the LORD, that I will perform that good thing which I have promised unto the house of Israel and to the house of Judah. 15 In those days, and at that time, will I cause the Branch of righteousness to grow up unto David; and he shall execute judgment and righteousness in the land. 16 In those days shall Judah be saved, and Jerusalem shall dwell safely: and this is the name wherewith she shall be called, The LORD our righteousness. 17 For thus saith the LORD; David shall never want a man to sit upon the throne of the house of Israel; 18 Neither shall the priests the Levites want a man before me to offer burnt offerings, and to kindle meat offerings, and to do sacrifice continually. 19 And the word of the LORD came unto Jeremiah, saying, 20 Thus saith the LORD; If ye can break my covenant of the day, and my covenant of the night, and that there should not be day and night in their season; 21 Then may also my covenant be broken with David my servant, that he should not have a son to reign upon his throne; and with the Levites the priests, my ministers. 22 As the host of heaven cannot be numbered, neither the sand of the sea measured: so will I multiply the seed of David my servant, and the Levites that minister unto me. 23 Moreover the word of the LORD came to Jeremiah, saying, 24 Considerest thou not what this people have spoken, saying, The two families which the LORD hath chosen, he hath even cast them off? thus they have despised my people, that they should be no more a nation before them. 25 Thus saith the LORD; If my covenant be not with day and night, and if I have not appointed the ordinances of heaven and earth; 26 Then will I cast away the seed of Jacob, and David my servant, so that I will not take any of his seed to be rulers over the seed of Abraham, Isaac, and Jacob: for I will cause their captivity to return, and have mercy on them.
[AD 430] Augustine of Hippo on Jeremiah 33:2
“And let them who know your name hope in you” when they shall have ceased hoping in wealth and in the other enticements of this world. For the soul indeed that seeks where to fix its hope, when it is torn away from this world, the knowledge of God’s name seasonably receives. For the mere name of God has now been published everywhere. When you know someone, you know his name. For the name is not a name for its own sake but for that which it signifies. Now it has been said, “The Lord is his name.” Therefore those who willingly submit to God as his servants have known this name.

[AD 461] Leo the Great on Jeremiah 33:14-16
But the majesty of the Son of God, in which he is equal with the Father in its garb of a slave’s humility, feared no diminution, required no augmentation. And the very effect of his mercy, which he expended on the restitution of humanity, he was able to bring about solely by the power of his Godhead, thus rescuing the creature that was made in the image of God from the yoke of his cruel oppressor. But because the devil had not shown himself so violent in his attack on the first man as to bring him over to his side without the consent of his free will, the voluntary sin and hostile desires of humanity had to be destroyed in such a way that the standard of justice should not stand in the way of the gift of grace. And therefore in the general ruin of the entire human race there was but one remedy in the secret of the divine plan which could help the fallen, and that was that one of the sons of Adam should be born free and innocent of original transgression, to prevail for the rest both by his example and his merits. Still further, because this was not permitted by natural generation, and because there could be no offspring from our faulty stock without seed, of which the Scripture says, “Who can make a clean thing conceived of an unclean seed? Is it not you who are alone?” David’s Lord was made David’s Son, and sprang from the fruit of the promised branch—One without fault, the twofold nature coming together into one Person, that by one and the same conception and birth might spring our Lord Jesus Christ, in whom was present both true Godhead for the performance of mighty works and true humanity for the endurance of sufferings.

[AD 458] Theodoret of Cyrus on Jeremiah 33:18-25
We see the fulfillment of this prophecy as well. When the new covenant was given, in keeping with the divine promise, the priesthood was also given according to the order of Melchizedek, and those to whom it was promised offer the spiritual sacrifice to God continually. Then he says, as it is impossible for day to become night, so it is impossible for the Davidic monarchy to be destroyed. The fulfillment of this prophecy is also clear: Christ, who is of David according to the flesh, does not occupy the throne here below. He does, however, govern all things as he sits next to the Father. This is precisely what he also says about the priests and the Levites, noting that their line will be compared with the host of heaven and the sand of the sea. The facts confirm what is said: the whole land and sea are full of high priests and the deacons performing the liturgy of the Levites.

[AD 585] Cassiodorus on Jeremiah 33:18-25
“But the counsel of the Lord stands forever. The thoughts of his heart are for all time.” Just as he said that the debased plans of people are to be made vain, so now he says that the dispositions of the Lord remain forever. While the sinner and the mortal person experience transient things, the eternal Lord established what will never be blameworthy. As Isaiah says, “All my counsel shall be enduring, and all that I meditated I shall achieve.” Jeremiah too says the same thing: “If my covenant were not under guard day and night, I should not have issued the laws of heaven and earth.”