The pairing with Parashah Bo, whose central material is the final plagues, the death of the firstborn, and Israel's hurried departure from Egyptian bondage under Pharaoh, rests on the continuing thread this account has already noted in the Vaera haftarah immediately before it: Egypt's downfall as a recurring theme in the prophets, here pushed forward centuries to a different conqueror entirely, Nebuchadnezzar rather than the plagues themselves.
Where the parashah shows Egypt broken from within, through a sequence of ten escalating plagues that finally force Pharaoh's hand, the haftarah shows Egypt broken from outside, through an invading foreign army centuries later, so that the two texts together present Egyptian power as vulnerable across very different historical circumstances and by very different means, a consistent pattern rather than a single unrepeated event.
The haftarah's closing reassurance to Jacob's descendants, promising rescue from captivity even while Egypt itself falls, mirrors the parashah's own closing note of Israel finally leaving Egyptian bondage behind, so that both texts end on the same underlying assurance: whatever befalls Egypt, Israel's own eventual security does not depend on Egypt's fate but on God's separate promise to them.