'Thirty' in the Bible

Three of the thirty leaders went down to David at the rocky cliff at the cave of Adullam, while a Philistine force was camped in the Valley of Rephaim.

He received honor from the thirty warriors, though he was not one of the three elite warriors. David put him in charge of his bodyguard.

Adina son of Shiza the Reubenite, leader of the Reubenites and the thirty warriors with him,

Ishmaiah the Gibeonite, one of the thirty warriors and their leader,Jeremiah, Jahaziel, Johanan, Jozabad the Gederathite,

But a spirit empowered Amasai, the leader of the thirty warriors, and he said: "We are yours, O David! We support you, O son of Jesse! May you greatly prosper! May those who help you prosper! Indeed your God helps you!" So David accepted them and made them leaders of raiding bands.

The Levites who were thirty years old and up were counted; there were 38,000 men.

Benaiah was the leader of the thirty warriors and his division; his son was Ammizabad.