The prophet Zenos is not found in the Old Testament. Undoubtedly, his record was contained on the brass plates of Laban. We often forget that the brass plates represented a larger body of literature than our current Old Testament. This is apparent from the statement of Nephi, it (today's Bible) is a record like unto the engravings which are upon the plates of brass, save there are not so many (1 Nephi 13:23). The plates of brass obviously contained a considerable body of literature no longer extant in our Old Testament. It contained the words of many prophets whose message, without the Book of Mormon, would have otherwise been lost to the world. These were men who clearly taught of a Messiah who would come in the flesh to redeem his people. These prophets include Zenock, Zenos, and Neum (see the Book of Mormon Index).