First Nephi - 8
Discussion related to this chapter in the Book of Mormon
Lehi sees a vision of the tree of life. He partakes of its fruit and desires his family to do likewise. He sees a rod of iron, a strait and narrow path, and the mists of darkness that enshroud men. Sariah, Nephi, and Sam partake of the fruit, but Laman and Lemuel refuse. Between 600 and 592 B.C.
Source: LDS Scriptures