In the ninth year of Zedekiah king of Judah, in the tenth month, King Nebuchadnezzar of Babylon advanced against Jerusalem with his entire army and laid siege to it.
References for Jeremiah 39:1
In the fourth month of Zedekiah's eleventh year, on the ninth day of the month, the city was broken into.
All the officials of the king of Babylon entered and sat at the Middle Gate: Nergal-sharezer, Samgar-nebo, Sarsechim the Rab-saris, Nergal-sharezer the Rab-mag, and all the rest of the officials of Babylon's king.
When he saw them, Zedekiah king of Judah and all the soldiers fled. They left the city at night by way of the king's garden through the gate between the two walls. They left along the route to the Arabah.
References for Jeremiah 39:4
However, the Chaldean army pursued them and overtook Zedekiah in the plains of Jericho, arrested him, and brought him to Nebuchadnezzar, Babylon's king, at Riblah in the land of Hamath. The king passed sentence on him [there].
References for Jeremiah 39:5
At Riblah the king of Babylon slaughtered Zedekiah's sons before his eyes, and he [also] slaughtered all Judah's nobles.
Then he blinded Zedekiah and put him in bronze chains to take him to Babylon.
References for Jeremiah 39:7