The Book of the Law of the Lord is a sacred book of scripture used by the Church of Jesus Christ of Latter Day Saints (Strangite), a sect of the Latter Day Saint movement. It is alleged to be a translation by the Strangite prophet James Strang of the brass Plates of Laban, which were originally acquired by Nephi, a leading figure in the early portion of the Book of Mormon. Strang claimed to have translated them using the Urim and Thummim, which Mormons believe was used by Joseph Smith to translate the Book of Mormon from ancient gold plates. Strang's followers believe that while the Book of the Law was lost to the Old World during Israel's captivity in foreign lands, a copy was included in the plates that the ancient prophet Nephi took with him to the New World.