2 Samuel 5:4

A son of thirty years is David in his being king; forty years he hath reigned;

1 Chronicles 26:31

Of the Hebronite, Jerijah is the head, of the Hebronite, according to his generations, for the fathers -- in the fortieth year of the reign of David they have been sought out, and there are found among them mighty ones of valour, in Jazer of Gilead --

1 Chronicles 29:27

and the days that he hath reigned over Israel are forty years; in Hebron he reigned seven years, and in Jerusalem he reigned thirty and three;

Luke 3:23

And Jesus himself was beginning to be about thirty years of age, being, as was supposed, son of Joseph,

1 Kings 2:11

and the days that David hath reigned over Israel are forty years, in Hebron he hath reigned seven years, and in Jerusalem he hath reigned thirty and three years.

1 Chronicles 3:4

Six have been borne to him in Hebron, and he reigneth there seven years and six months, and thirty and three years he hath reigned in Jerusalem.

Treasury of Scripture Knowledge

Summary

David was thirty years old when he began to reign, and he reigned forty years.

Thirty

Bible References

Thirty

Luke 3:23
And Jesus himself was beginning to be about thirty years of age, being, as was supposed, son of Joseph,

Forty

1 Chronicles 26:31
Of the Hebronite, Jerijah is the head, of the Hebronite, according to his generations, for the fathers -- in the fortieth year of the reign of David they have been sought out, and there are found among them mighty ones of valour, in Jazer of Gilead --
1 Chronicles 29:27
and the days that he hath reigned over Israel are forty years; in Hebron he reigned seven years, and in Jerusalem he reigned thirty and three;