Benaiah was even more famous than the Thirty Heroes, but he did not become a member of the Three Heroes. David made Benaiah the leader of his bodyguards.
Ahimelech answered, “David is very faithful to you. Not one of your other officers is as faithful as David. He is your own son-in-law and the captain of your bodyguards. Your own family respects David.
An enemy might be able to defeat one person, but two people can stand back-to-back to defend each other. And three people are even stronger. They are like a rope that has three parts wrapped together—it is very hard to break.