4 After Seth was born, Adam lived 800 years and had other sons and daughters.

Read Genesis 5:4 Using Other Translations

And the days of Adam after he had begotten Seth were eight hundred years: and he begat sons and daughters:
The days of Adam after he fathered Seth were 800 years; and he had other sons and daughters.
After the birth of Seth, Adam lived another 800 years, and he had other sons and daughters.