Jeremiah 51:31
One post shall run to meet another, and one messenger to meet another, to shew the king of Babylon that his city is taken at one end,
Cross-reference
Jeremiah 50:24 declares Babylon caught in a snare — the same city's downfall that the messengers now announce.
Jeremiah 50:43 describes the king of Babylon's reaction upon hearing the report — the direct aftermath of the news delivered in 51:31.
1 Samuel 4:12-18 features a runner bringing news of Israel's defeat to Eli — a direct narrative parallel to the messengers reporting Babylon's capture.
2 Samuel 18:19-31 shows Ahimaaz running to tell David of Absalom's defeat — another messenger bringing news of battle outcome.
Isaiah 21:3-9 prophesies Babylon's fall with watchmen and the cry 'Fallen, fallen' — same event announced by runners in Jeremiah.
Daniel 5:30 records Belshazzar's death that very night — the fulfillment of the fall announced by messengers in Jeremiah.