Isaiah 3:4

And I will make children their chiefs, and foolish ones will have rule over them.

Ecclesiastes 10:16

Unhappy is the land whose king is a boy, and whose rulers are feasting in the morning.

1 Kings 3:7-9

And now, O Lord my God, you have made your servant king in the place of David my father; and I am only a young boy, with no knowledge of how to go out or come in.

2 Chronicles 33:1

Manasseh was twelve years old when he became king, and he was ruling for fifty-five years in Jerusalem.

2 Chronicles 34:1

Josiah was eight years old when he became king; he was ruling in Jerusalem for thirty-one years.

2 Chronicles 36:2

Jehoahaz was twenty-three years old when he became king; he was ruling in Jerusalem for three months.

2 Chronicles 36:5

Jehoiakim was twenty-five years old when he became king; he was ruling in Jerusalem for eleven years, and he did evil in the eyes of the Lord his God.

2 Chronicles 36:9

Jehoiachin was eighteen years old when he became king; he was ruling in Jerusalem for three months and ten days, and he did evil in the eyes of the Lord.

2 Chronicles 36:11

Zedekiah was twenty-one years old when he became king; he was ruling in Jerusalem for eleven years.

Treasury of Scripture Knowledge did not add

Basic English, produced by Mr C. K. Ogden of the Orthological Institute - public domain