פירוש על דברי הימים ב 12:15

in the words of Shemaiah the prophet Every prophet would write his book, containing that which he prophesied, and this is the Shemaiah who was mentioned above (11:2, 12:5). And the verse written further (13:22), “And the rest of the deeds of Abijah and his ways and his words are written in the midrash of the prophet Iddo,” proves this, [that each prophet wrote a book of his prophecies, and] his [Iddo’s] book was called midrash.