'Thirty' in the Bible

He had six sons in Hebron; he was ruling there for seven years and six months, and in Jerusalem for thirty-three years.

And with them, recorded in generations by their families, were bands of fighting-men, thirty-six thousand of them, for they had a great number of wives and sons.

And the sons of Bela: Ezbon and Uzzi and Uzziel and Jerimoth and Iri, five; heads of their families, great men of war; there were twenty-two thousand and thirty-four of them recorded by their families.

And three of the thirty went down to David, to the rock, into the strong place of Adullam; and the army of the Philistines had taken up their position in the valley of Rephaim.

And Abishai, the brother of Joab, was chief of the thirty, for he put to death three hundred with his spear, but he had not a name among the three.

Of the thirty, he was the noblest, and was made their captain, but he was not equal to the first three.

These were the acts of Benaiah, the son of Jehoiada, who had a great name among the thirty men of war.

He was honoured over the thirty, but he was not equal to the first three: and David put him over his servants.

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

And Ishmaiah the Gibeonite, a great man among the thirty, and their chief; and Jeremiah and Jehaziel and Johanan and Jozabad the Gederathite;

And of Naphtali, a thousand captains with thirty-seven thousand spearmen.

Of the sons of Gershom: Joel the chief, and his brothers, a hundred and thirty;

So with this money they got thirty-two thousand war-carriages, and the help of the king of Maacah and his people, who came and took up their position in front of Medeba. And the children of Ammon came together from their towns for the fight.

And the Levites, all those of thirty years old and over, were numbered; and the number of them, by heads, man by man, was thirty-eight thousand.

This is the same Benaiah who was the great man of the thirty, chief of the thirty; and in his division was Ammizabad his son.

For forty years he was ruling as king over Israel, seven years in Hebron and thirty-three years in Jerusalem.