Sheshach
Sheshach is a symbolic designation for Babylon that appears twice in Jeremiah, both times in oracles of judgment against the kingdoms of the earth. The two passages position the name at structurally weighted moments: the bottom of the cup-of-wrath catalog in Jeremiah 25, and the opening lament of Babylon's fall in Jeremiah 51.
Last to Drink the Cup
In Jeremiah's vision of the cup of Yahweh's wrath, the kings of the earth are made to drink in succession. The list closes by sweeping in everyone outside Judah's immediate horizon and lands on a single concluding figure: "and all the kings of the north, far and near, one with another; and all the kingdoms of the world, which are on the face of the earth: and the king of Sheshach will drink after them" (Jer 25:26). Sheshach occupies the final, climactic position — the king who drinks last, after every other kingdom has already been forced to the cup.
Sheshach and Babylon Together
The second occurrence sits inside the long oracle against Babylon and explicitly pairs the two names in a single verse: "How is Sheshach taken! And the praise of the whole earth seized! How has Babylon become a desolation among the nations!" (Jer 51:41). The lament cries out over Sheshach in one line and answers with Babylon in the next, treating them as the same city under two names. The "praise of the whole earth" — the city's reputation — is what falls when Sheshach falls; the desolation that follows is Babylon's.
Across both verses the pattern is the same: Sheshach stands for Babylon at the moments when judgment is most heavily pressed on the great northern empire — once as the last to drink the cup, once as the named city brought to ruin among the nations.