**Noah** [(the 10th generation)] was born in Year 1056, 182 years after Lamech, and lived 950 years. [(The Bachya writes that it was 1,042 years from Adam to Noah, which is an error; it should be Year 1056)]. All those born before Noah had hands that were smooth and undivided, without separation of fingers, for they did not need to work the ground. Noah was born with separated fingers, and from this Lamech understood that this one would be needed for agricultural work [(Midrash Avkhir).
Pirkei d'Rabbi Eliezer writes on this: "And from our toil and the pain of our hands from the ground"—until now we had pain of hands from working the ground from our work, and "from the pain of our hands" in gematria equals "hands without separation of fingers they were," and so it is concluded]. Noah fashioned tools for working the ground [(Zohar Bereishit)].