This Benaiah was a mighty man among the Thirty and over the Thirty, and his son Ammizabad was in charge of his division.

Ishmaiah the Gibeonite, a warrior among the Thirty and a leader over the Thirty;
Jeremiah, Jahaziel, Johanan, Jozabad the Gederathite;

And the Levites were numbered from thirty years old and upward; and their number, by their polls, man by man, was thirty-eight thousand.

This is the list of David’s mighty men: Jashobeam, the son of a Hachmonite, the chief of the thirty [heroes]. He lifted up his spear against three hundred whom he killed at one time.

As for Abshai the brother of Joab, he was chief of the thirty, and he swung his spear against three hundred and killed them; and he had a name as well as the thirty.

He was the most honored of the Thirty, but he did not become one of the Three. David put him in charge of his bodyguard.

Then the Spirit took control of Amasai, chief of the Thirty, and he said:

We are yours, David,
we are with you, son of Jesse!
Peace, peace to you,
and peace to him who helps you,
for your God helps you.

So David received them and made them leaders of his troops.

And with them by their generations, according to their fathers' houses, were military bands for war, thirty-six thousand; for they had many wives and sons.

And the sons of Bela: Ezbon, and Uzzi, and Uzziel, and Jerimoth, and Iri, five; heads of fathers' houses, mighty men of valour; and they were registered by their genealogy twenty-two thousand and thirty-four.

six were born to him in Hebron. And there he reigned seven years and six months. And in Jerusalem he reigned thirty-three years.

of the sons of Gershom, Joel the chief, and his brethren a hundred and thirty;

And they hired thirty-two thousand chariots, and the king of Maacah and his people; and they came and encamped before Medeba. And the children of Ammon gathered together from their cities, and came to battle.

And three of the thirty chiefs went down to the rock to David, to the cave of Adullam, when the army of the Philistines was encamped in the valley of Rephaim.

Adina the son of Shiza the Reubenite, a captain of the Reubenites, and thirty with him;

And of Naphtali a thousand captains, and with them thirty-seven thousand with shield and spear.

And the time that he reigned over Israel was forty years: he reigned seven years in Hebron, and he reigned thirty-three years in Jerusalem.