Among the records the Nephites kept were the small and large plates of Nephi (see 1 Nephi 9:2). The large plates primarily contained the secular history of the people, while the small plates included the sacred history (see 1 Nephi 9:2–4). The books of 1 Nephi through Omni were recorded on the small plates of Nephi. The books of Mosiah through 4 Nephi are Mormon’s abridgement taken from the large plates (see commentary for 1 Nephi 9:1–5 on page 23).