1 Nephi 17:7-9

7 And it came to pass that after I, Nephi, had been in the land of Bountiful for the space of many days, the voice of the Lord came unto me, saying: Arise, and get thee into the mountain. And it came to pass that I arose and went up into the mountain, and cried unto the Lord.

8 And it came to pass that the Lord spake unto me, saying: Thou shalt construct a ship, after the manner which I shall show thee, that I may carry thy people across these waters.

9 And I said: Lord, whither shall I go that I may find ore to molten, that I may make tools to construct the ship after the manner which thou hast shown unto me?