'Thirty' in the Bible

Also he made before the house two pillars of thirty and five cubits high, and the chapiter that was on the top of each of them was five cubits.

Also he made a molten sea of ten cubits from brim to brim, round in compass, and five cubits the height thereof; and a line of thirty cubits did compass it round about.

There was no war until the thirty-fifth year of Asa’s reign.

In the thirty-sixth year of Asa, Israel’s King Baasha went to war against Judah. He built Ramah in order to deny access to anyone—going or coming—to Judah’s King Asa.

And Asa in the thirty and ninth year of his reign was diseased in his feet, until his disease was exceeding great: yet in his disease he sought not to the LORD, but to the physicians.

And Jehoshaphat reigned over Judah: he was thirty and five years old when he began to reign, and he reigned twenty and five years in Jerusalem. And his mother's name was Azubah the daughter of Shilhi.

Jehoram was thirty and two years old when he began to reign, and he reigned eight years in Jerusalem.

Thirty and two years old was he when he began to reign, and he reigned in Jerusalem eight years, and departed without being desired. Howbeit they buried him in the city of David, but not in the sepulchres of the kings.

But Jehoiada waxed old, and was full of days when he died; an hundred and thirty years old was he when he died.

without regard to their genealogical enrollment, to the males from thirty years old and upward—everyone who entered the house of the Lord for his daily obligations—for their work in their duties according to their divisions;

Josiah was eight years old when he began to reign, and he reigned in Jerusalem one and thirty years.

And Josiah gave to the people, of the flock, lambs and kids, all for the passover offerings, for all that were present, to the number of thirty thousand, and three thousand bullocks: these were of the king's substance.