2 Samuel 23:24
Asahel the brother of Joab was one of the thirty; Elhanan the son of Dodo of Beth–lehem,
Cross-reference
2 Samuel 2:18
Historical context
2 Samuel 2:18 introduces Asahel's speed and relation to Joab — background for his place among the thirty.
1 Chronicles 11:26
Parallel
1 Chronicles 11:26 gives the parallel list of David's mighty men, including Asahel and Elhanan.
1 Chronicles 27:7
Historical context
1 Chronicles 27:7 places Asahel as leader of a monthly division — extending his role beyond the thirty.