The days of Methuselah were nine hundred sixty and nine years - This is the longest life mentioned in Scripture, and probably the longest ever lived; but we have not authority to say positively that it was the longest. Before the flood, and before artificial refinements were much known and cultivated, the life of man was greatly protracted, and yet of him who lived within thirty-one years of a thousand it is said he died; and the longest life is but as a moment when it is past. Though life is uncertain, precarious, and full of natural evils, yet it is a blessing in all its periods if devoted to the glory of God and the interest of the soul; for while it lasts we may more and more acquaint ourselves with God and be at peace, and thereby good shall come unto us; Job 22:21.

And all the days of Methuselah were nine hundred and sixty nine years, and he died,.... This was the oldest man that ever lived, no man ever lived to a thousand years: the Jews give this as a reason for it, because a thousand years is God's day, according to Psalm 90:4 and no man is suffered to arrive to that. His name carried in it a prediction of the time of the flood, which was to be quickly after his death, as has been observed; see Gill on Genesis 5:21. Some say he died in the year of the flood; others, fourteen years after, and was in the garden of Eden with his father, in the days of the flood, and then returned to the world (a); but the eastern writers are unanimous that he died before the flood: the Arabic writers (b) are very particular as to the time in which he died; they say he died in the six hundredth year of Noah, on a Friday, about noon, on the twenty first day of Elul, which is Thout; and Noah and Shem buried him, embalmed in spices, in the double cave, and mourned for him forty days: and some of the Jewish writers say he died but seven days before the flood came, which they gather from Genesis 7:10 "after seven days"; that is, as they interpret it, after seven days of mourning for Methuselah (c): he died A. M. 1656, the same year the flood came, according to Bishop Usher.
(a) Shalshalet Hakabala, fol. 74. 2. (b) Apud Hottinger, p. 244. (c) Bereshit Rabba, sect. 32. fol. 27. 3. Juchasin, fol. 6. 1. Baal Habturim in Genesis. vii. 10.