the labor which they had to perform was to look 1 Nephi 17:41

1 Nephi 17:41

And he did straiten them in the wilderness with his rod; for they hardened their hearts, even as ye have; and the Lord straitened them because of their iniquity. He sent fiery flying serpents among them; and after they were bitten he prepared a way that they might be healed; and the labor which they had to perform was to look; and because of the simpleness of the way, or the easiness of it, there were many who perished.
1 Nephi 17:41

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Photo by Jakub Kriz

They have become free forever, knowing good from evil; to act for themselves and not to be acted upon - 2 Nephi 2:26

2 Nephi 2:26

And the Messiah cometh in the fulness of time, that he may redeem the children of men from the fall. And because that they are redeemed from the fall they have become free forever, knowing good from evil; to act for themselves and not to be acted upon, save it be by the punishment of the law at the great and last day, according to the commandments which God hath given.
2 Nephi 2:26

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Photo by Ian Schneider