Aliya Summary: Lemech accidentally killed his great-great-great-great-grandfather Cain in a hunting accident; the blood of Abel was finally avenged. Adam and Eve gave birth to a third son, Shet. This Aliya then chronicles the first seven generations of mankind, from Adam to the righteous Enoch.
Lemech’s wives knew of the impending flood, and that almost everyone would be killed, and therefore stopped having kids. Lemech complained about them to Adam, and Adam argued that “You perform your commandments, and He will do His”, meaning that we do what we’re supposed to do, and let G-d deal with the consequences. The wives countered that Adam should take his own advice, to which he stood corrected, and proceeded to have Shet, of whom Noach was a descendant, who did survive the flood, and who led the new world!