Mahalalel lived after he fathered Jared 830 years and had other sons and daughters.
God records the lineage of the righteous with care and clarity, setting down their years at length so all can see them, while the wicked are left nameless and forgotten. The memory of the just is blessed; the name of the wicked shall rot. These long lives teach us to number our days, for even centuries are but a quick passage.
AI summary
Commenting on Genesis 5:6-20
And Enoch lived sixty and five years, and begat Methuselah. Here the Septuagint version adds again an hundred years; and that Enoch had a son, whose name was Methuselah, is affirmed by Eupolemus (r), an Heathen writer; and Enoch being a prophet gave him this name under a spirit of prophecy, foretelling by it when the flood should be; for his name, according to Bochart...
Seth bore the image of God as Adam did, yet corrupted by sin transmitted through his father. The recurring refrain "and he died" announces death as an unchangeable law from Adam onward; yet each man fathered children before he fell, so life persisted amid death, and the race endured to bring forth the Seed who would conquer death itself.
AI summary
Commenting on Genesis 5:3-32