Genesis 5:13

And Cainan lived after he begat Mahalaleel eight hundred and forty years, and begat sons and daughters:

And Cainan lived, after he begat Mahalaleel, eight hundred and forty years,.... The Septuagint has seven hundred and forty, which, added to the years given him before, makes the same sum:

and begat sons and daughters; as his progenitors did.