“These are the generations of Shem: Shem was an hundred years old, and begat Arphaxad two years after the flood:”
King James Version (KJV)
11:10 Observe here, That nothing is left upon record concerning those of this line, but their names and ages; the Holy Ghost seeming to hasten thro' them to the story of Abraham. How little do we know of those that are gone before us in this world, even those that lived in the same places where we live! Or indeed of those who are our contemporaries, but in distant places. That there was an observable gradual decrease in the years of their lives. Shem reached to 600 years, which yet fell short of the age of the patriarchs before the flood; the three next came short of 500, the three next did not reach to 300, and after them we read not of any that attained to 200 but Terah; and not many ages after this, Moses reckoned 70 or 80 to be the utmost men ordinarily arrive at. When the earth began to be replenished, mens lives began to shorten so that the decrease is to be imputed to the wise disposal of providence, rather than to any decay of nature. That Eber, from whom the Hebrews were denominated, was the longest lived of any that were born after the flood; which perhaps was the reward of his strict adherence to the ways of God.