In 2 Nephi 4:14 of the Book of Mormon, Nephi mentions that his father, Lehi, spoke before his death; as opposed to…after his death?

“For I, Nephi, was constrained to speak unto them, according to his word; for I had spoken many things unto them, and also my father, before his death; many of which sayings are written upon mine other plates; for a more history part are written upon mine other plates.”