2 Kings 24:8-12

8Jehoiachin was eighteen years old when he became king, and he reigned in Jerusalem three months. His mother’s name was Nehushta daughter of Elnathan; she was from Jerusalem. 9And he did evil in the sight of the LORD, just as his father had done.

10At that time the servants of Nebuchadnezzar king of Babylon marched up to Jerusalem, and the city came under siege. 11And Nebuchadnezzar king of Babylon came to the city while his servants were besieging it. 12Jehoiachin king of Judah, his mother, his servants, his commanders, and his officials all surrendered to the king of Babylon.

So in the eighth year of his reign, the king of Babylon took him captive.