“Then the king of Babylon slew the sons of Zedekiah in Riblah before his eyes: also the king of Babylon slew all the nobles of Judah.”
King James Version (KJV)
39:5 Riblah - Riblah was upon the borders of Canaan. Zedekiah was a tributary to the king of Babylon, and so subject to his power, having made a covenant with him, and secured his allegiance by his oath to him.