And the days of Adam after he had begotten Seth were eight hundred years: and he begat sons and daughters:
4. And the days of Adam after he had begotten Seth . In the number of years here recorded we must especially consider the long period which the patriarchs lived together. For through six successive ages, when the family of Seth had grown into a great people, the voice of Adam might daily resound, in order to renew the memory of the creation, the fall...
This genealogy traces the holy seed through whom Christ came in the flesh. Mark well: man is not his own maker and therefore not his own master; God who made him must direct him. Male and female both bear God's likeness, so between the sexes there is no great inequality as some falsely imagine.
AI summary
Commenting on Genesis 5:1-5
And the days of Adam, after he had begotten Seth, were eight hundred years,.... The Septuagint version is seven hundred; for having added one hundred years more the should be, to the years of his life before the birth of Seth, here they are taken away to make the number of his years complete: and he begat sons and daughters; not only after the birth...