The “five books of Moses” refers to Genesis, Exodus, Leviticus, Numbers, and Deuteronomy.
Book of Mormon Central
One sometimes sees quotations from and allusions to various parts of the five books of Moses in the Book of Mormon. 2 Nephi 26:11 alludes to Genesis 6:3, Abinadi quotes the Ten Commandments from Exodus 20 in Mosiah 13, Mosiah 23:15 alludes to Leviticus 19:18, Alma 33:21 references Numbers 21:4–9, and 2 Nephi 25:29 alludes to Deuteronomy 6:5.