1 Nephi 5

Lehi’s wife, Sariah, begins to panic that her boys have died on their quest back to Jerusalem, but they return safe and sound and everyone celebrates. Lehi takes time to review the contents of the brass plates and finds much of the content we are familiar with as the beginning books of the Bible (in the Old Testament).

The last couple verses summarize the chapter and the whole purpose of the dangerous mission they went on:

 21 And we had obtained the records which the Lord had commanded us, and searched them and found that they were desirable; yea, even of great worth unto us, insomuch that we could preserve the commandments of the Lord unto our children.

 22 Wherefore, it was wisdom in the Lord that we should carry them with us, as we journeyed in the wilderness towards the land of promise.