“Except for David, Hezekiah and Josiah, they all were wicked;
they abandoned the Law of the Most High, these kings of Judah, right to the very end.
So he gave over their power to others,
their glory to a foolish foreign nation
who burned the holy city and left its streets desolate,
as Jeremiah had foretold;
for they had treated him badly who even in the womb had been made a prophet,
to root out, pull down, and destroy, and then to build and to plant.
Ezekiel beheld the vision
and described the different creatures of the chariot;
he also referred to Job,
who always persevered in the right path.
Then, too, the Twelve Prophets— may their bones return to life from their resting place!–
gave new strength to Jacob and saved him by their faith and hope.”
By the time the book of Sirach was written, probably around 2nd century BC, the twelve minor prophets, i.e., Hosea, Joel, Amos, Obadiah, Jonah, Micah, Nahum, Habakkuk, Zephaniah, Haggai, Zechariah, and Maleachi, had been referred simply as a single collection, i.e., the Twelve Prophets.
And it might be interesting too to note the belief about afterlife in that era, which can be inferred by the comment of the author about the Twelve: ‘may their bones return to life from their resting place’, which indicated a belief in resurrection after their death. They were in ‘their resting place’ right now and they were waiting to return to life.