2 Chronicles 36:11
Zedekiah was twenty-one years old when he became king; he was ruling in Jerusalem for eleven years.
2 Kings 24:18-20
Zedekiah was twenty-one years old when he became king, and he was king in Jerusalem for eleven years; his mother's name was Hamutal, daughter of Jeremiah of Libnah.
Jeremiah 27:1
When Zedekiah, the son of Josiah, king of Judah, first became king this word came to Jeremiah from the Lord, saying,
Jeremiah 28:1
And it came about in that year, when Zedekiah first became king of Judah, in the fourth year, in the fifth month, that Hananiah, the son of Azzur the prophet, who came from Gibeon, said to Jeremiah in the house of the Lord, before the priests and all the people,
Jeremiah 52:1-3
Zedekiah was twenty-one years old when he became king; he was king for eleven years in Jerusalem: and his mother's name was Hamutal, the daughter of Jeremiah of Libnah.