Jehoiachin was eight years old when he became king, and he reigned in Jerusalem three months and ten days. And he did evil in the sight of the Lord.
References for 2 Chronicles 36:9
At the turn of the year King Nebuchadnezzar summoned him and took him to Babylon, with the costly articles from the house of the Lord, and made Zedekiah, Jehoiakim's brother, king over Judah and Jerusalem.
References for 2 Chronicles 36:10
Zedekiah was twenty-one years old when he became king, and he reigned eleven years in Jerusalem.
He did evil in the sight of the Lord his God, and did not humble himself before Jeremiah the prophet, who spoke from the mouth of the Lord.
And he also rebelled against King Nebuchadnezzar, who had made him swear an oath by God; but he stiffened his neck and hardened his heart against turning to the Lord God of Israel.
Moreover all the leaders of the priests and the people transgressed more and more, according to all the abominations of the nations, and defiled the house of the Lord which He had consecrated in Jerusalem.