'Thirty' in the Bible

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

And with them, by their generations, after their fathers houses, were bands of the host for war, six and thirty 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 valor; and they were reckoned by genealogy twenty and two thousand and thirty and four.

And this is the number of the mighty men whom David had: Jashobeam, the son of a Hachmonite, the chief of the thirty; he lifted up his spear against three hundred and slew them at one time.

And three of the thirty chief men went down to the rock to David, into the cave of Adullam; and the host of the Philistines were encamped in the valley of Rephaim.

Behold, he was more honorable than the thirty, but he attained not to the first three: and David set him over his guard.

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

and Ishmaiah the Gibeonite, a mighty man among the thirty, and over the thirty, and Jeremiah, and Jahaziel, and Johanan, and Jozabad the Gederathite,

Then the Spirit came upon Amasai, who was chief of the thirty, and he said , Thine are we, David, and on thy side, thou son of Jesse: peace, peace be unto thee, and peace be to thy helpers; for thy God helpeth thee. Then David received them, and made them captains of the band.

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

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

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

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

This is that Benaiah, who was the mighty man of the thirty, and over the thirty: and of his course was Ammizabad his son.

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