2 Chronicles 33:1

A son of twelve years is Manasseh in his reigning, and fifty and five years he hath reigned in Jerusalem;

2 Kings 21:1-18

A son of twelve years is Manasseh in his reigning, and fifty and five years he hath reigned in Jerusalem, and the name of his mother is Hephzi-Bah;

1 Chronicles 3:13

Ahaz his son, Hezekiah his son, Manasseh his son,

2 Chronicles 32:33

And Hezekiah lieth with his fathers, and they bury him in the uppermost of the graves of the sons of David, and all Judah and the inhabitants of Jerusalem have done honour to him at his death, and reign doth Manasseh his son in his stead.

2 Chronicles 34:1-2

A son of eight years is Josiah in his reigning, and thirty and one years he hath reigned in Jerusalem,

Ecclesiastes 10:16

Woe to thee, O land, when thy king is a youth, And thy princes do eat in the morning.

Isaiah 3:4

And I have made youths their heads, And sucklings rule over them.

Isaiah 3:12

My people -- its exactors are sucklings, And women have ruled over it. My people -- thy eulogists are causing to err, And the way of thy paths swallowed up.

Matthew 1:10

and Hezekiah begat Manasseh, and Manasseh begat Amon, and Amon begat Josiah,

Treasury of Scripture Knowledge

Summary

Manasseh was twelve years old when he began to reign, and he reigned fifty and five years in Jerusalem:

General references

Bible References

Twelve

2 Chronicles 34:1
A son of eight years is Josiah in his reigning, and thirty and one years he hath reigned in Jerusalem,
Ecclesiastes 10:16
Woe to thee, O land, when thy king is a youth, And thy princes do eat in the morning.
Isaiah 3:4
And I have made youths their heads, And sucklings rule over them.

General references

Matthew 7:8
for every one who is asking doth receive, and he who is seeking doth find, and to him who is knocking it shall be opened.