Second Nephi 4:2

For behold, he truly prophesied concerning all his seed. And the prophecies which he wrote, there are not many greater. And he prophesied concerning us, and our future generations; and they are written upon the plates of brass.

The day will surely come when the brass plates of Lehi will be given to us. The word of God is never lost. The Lord knows where all his words are hidden, and he knows when we are ready to receive them. "We believe all that God has revealed, all that He does now reveal, and we believe that He will yet reveal many great and important things pertaining to the Kingdom of God." (Article of Faith 9)