Thought from Today's Old Testament Passage:
[Jeremiah 33:14-26] Jeremiah has already foretold the renewal of the royal line in which a king will rule justly and here he repeats 23:5. The Messiah bears the royal name and title—the righteous new "shoot" (Branch) who will bring peace and security—and give His name to His city and people. Yhwh-sidqenu here foreshadows the identity of the redeemed Church and individuals with Christ "who is made unto us righteousness" (I Cor. 1:30; 2 Cor. 5:21). The participants in the covenant must display the same character (holiness and righteousness) as their master. The security of the promise is illustrated by reference to earlier unbroken covenants: (i) Davidic (17; cf. 2 Sam. 23:5); (ii) the priesthood (18); (iii) day and night (the divinely instituted "natural law" as promised to Noah in Gen. 8:22; cf. v. 20). Christ, like Melchizedek, unites the offices of king and priest (Heb. 7:1, 17-25) and ideally believers must reflect this (cf. Rev. 1:6). His sacrifice completed everything foreshadowed by the Levitical priests. Ideally church and state work together (note king and priest, 21). The Davidic covenant is here [vv. 22-26] worded to show it continues from the earlier one made with Abraham (cf. Gen. 15:5; 22:17). This is used as an answer to those who argue that God has abandoned both Israel and Judah.
F. F. Bruce, Gen. Ed., The International Bible Commentary (Marshall Pickering/Zondervan, 1986), pp. 785-786.