'Twelve' in the Bible

In the eighteenth year of King Jehoshaphat's reign over Judah, Ahab's son Jehoram became king over Israel in Samaria; he ruled for twelve years.

In the thirty-ninth year of King Azariah's reign over Judah, Menahem son of Gadi became king over Israel. He reigned for twelve years in Samaria.

Manasseh was twelve years old when he became king, and he reigned for fifty-five years in Jerusalem. His mother was Hephzibah.

The bronze of the items that King Solomon made for the Lord's temple -- including the two pillars, the big bronze basin called "The Sea," the twelve bronze bulls under "The Sea," and the movable stands -- was too heavy to be weighed.