Jeremiah prophesied concerning Babylon and their ongoing siege and invasion of Israel. His reference in this chapter has been suggested to refer to how God empowered Cyrus in later times to overthrow Babylon. Cyrus helped to restore the Jewish kingdom and provided resources to rebuild Jewish structures. Jeremiah seemed to prophesy about the future of Babylon. During the time of his prophecy, Babylon was a major dynasty that ruled over the Jews.
Although the Jews had disobeyed God and this led to their captivity and bondage, God would still execute vengeance. “The Lord has brought about our vindication; come, let us declare in Zion the work of the Lord our God” (Jeremiah 51:10). Babylon had also destroyed the Jewish temple and taken the gold and precious vessels which Solomon acquired.
Jeremiah’s comments in chapter 51 can also be used to reference the church which God has called to establish his kingdom. Paul reminds us in Hebrews 11 how our bible heroes through faith established the kingdom of God. Like Abraham whose faith was accounted for righteousness, they also left their examples of faith for us to follow. “who through faith conquered kingdoms, enforced justice, obtained promises, stopped the mouths of lions” (Hebrews 11:33).
We have a godly heritage and inheritance and we have been given the weapons to win every battle. The weapons will be formed but they will not prevail against us because the battle belongs to God. “Therefore thus says the Lord: “Behold, I will plead your cause and take vengeance for you. I will dry up her sea and make her fountain dry” (Jeremiah 51:36).