Job 42:16

Here he goes on with words to the same purport. Though his patience had not its perfect work, his repentance for his impatience had. He is here thoroughly humbled for his folly and unadvised speaking, and it was forgiven him.

After this lived Job a hundred and forty years - How long he had lived before his afflictions, we cannot tell. If we could rely on the Septuagint, all would be plain, who add here, Τα δε παντα ετη εζησεν, διακοσια τεσσαρακοντα; “And all the years that Job lived were two hundred and forty.” This makes him one hundred years of age when his trial commenced. Coverdale has, After this lyved Job forty yeares, omitting the hundred. So also in Becke’s Bible, 15

The Septuagint makes Job live a hundred seventy years after his calamity, and two hundred forty in all. This would make him seventy at the time of his calamity, which added to a hundred forty in Hebrew text makes up two hundred ten; a little more than the age (two hundred five) of Terah, father of Abraham, perhaps his contemporary.

After this Job lived an hundred and forty years - As his age at the time his calamities commenced is not mentioned, it is of course impossible to determine how old he was when he died. The Septuagint, however, has undertaken to determine this, but on what authority is unknown. They render this verse, “And Job lived after this affliction an hundred and seventy years: so that all the years that he lived were two hundred and forty.” According to this, his age would have been seventy when his afflictions came upon him; but this is a mere conjecture. Why the authors of that version have added thirty years to the time which he lived after his calamities, making it an hundred and seventy instead of an hundred and forty as it is in the Hebrew text, is unknown. The supposition that he was about seventy years of age when his calamities came upon him, is not an unreasonable one. He had a family of ten children, and his sons were grown so as to have families of their own, Job 1:4. It should be remembered, also, that in the patriarchal times, when people lived to a great age, marriages did not occur at so early a period of life as they do now. In this book, also, though the age of Job is not mentioned, yet the uniform representation of him is that of a man of mature years; of large experience and extended observation; of one who had enjoyed high honor and a wide reputation as a sage and a magistrate; and when these circumstances are taken into the account, the supposition of the translators of the Septuagint, that he was seventy years old when his afflictions commenced, is not improbable. If so, his age at his death was two hundred and ten years. The age to which he lived is mentioned as remarkable, and was evidently somewhat extraordinary. […]