2 Samuel 5:4

5:4 David was thirty years old when he began to reign and he reigned for forty years.

2 Samuel 23:24

23:24 Included with the thirty were the following: Asahel the brother of Joab, Elhanan son of Dodo from Bethlehem, ¹ 

[23:24]  ¹ map For location see Map5 B1; Map7 E2; Map8 E2; Map10 B4.