'Thirty' in the Bible

Six have been borne to him in Hebron, and he reigneth there seven years and six months, and thirty and three years he hath reigned in Jerusalem.

And beside them, by their generations, of the house of their fathers, are troops of the host of battle, thirty and six thousand, for they multiplied wives and sons;

And sons of Bela: Ezbon, and Uzzi, and Uzziel, and Jerimoth, and Iri, five; heads of a house of fathers, mighty of valour, with their genealogy, twenty and two thousand, and thirty and four.

And this is an account of the mighty ones whom David hath: Jashobeam son of a Hachmonite is head of the thirty; he is lifting up his spear against three hundred -- wounded, at one time.

And three of the thirty heads go down on the rock unto David, unto the cave of Adullam, and the host of the Philistines is encamping in the valley of Rephaim,

Of the thirty, lo, he is honoured, and unto the first three he hath not come, and David setteth him over his guard.

Adina son of Shiza the Reubenite, head of the Reubenites, and by him thirty,

and Ishmaiah the Gibeonite, a mighty one among the thirty, and over the thirty, and Jeremiah, and Jahaziel, and Johanan, and Josabad the Gederathite.

And of Naphtali, a thousand heads, and with them, with target and spear, are thirty and seven thousand.

Of sons of Gershom: Joel the chief, and his brethren, a hundred and thirty.

and they hire to them two and thirty thousand chariots, and the king of Maachah and his people, and they come in and encamp before Medeba, and the sons of Ammon have been gathered out of their cities, and come in to the battle.

and the Levites are numbered from a son of thirty years and upward, and their number, by their polls, is of mighty men thirty and eight thousand.

This Benaiah is a mighty one of the thirty, and over the thirty, and in his course is Ammizabad his son.

and the days that he hath reigned over Israel are forty years; in Hebron he reigned seven years, and in Jerusalem he reigned thirty and three;