John Calvin Commentary Genesis 9:28

"And Noah lived after the flood three hundred and fifty years." — Genesis 9:28 (ASV)

And Noah lived. Although Moses briefly states the age of the holy man and does not record his historical records and the memorable events of his life, yet those things which are certain, and which Scripture elsewhere records, we should remember. Within one hundred and fifty years, the offspring of his three sons became so numerous that he had sufficient and even abundant proof of the effectiveness of the divine blessing Increase and multiply.

He sees not only one city filled with his grandchildren, nor his descendants expanded merely to three hundred families, but many nations springing from one of his sons who would inhabit extensive regions. This astonishing increase, since it was a visible representation of the divine favor toward him, would undoubtedly fill him with unbounded joy.

For Abraham was nearly fifty years old when his ancestor Noah died. In the meantime, Noah was compelled to witness many things that would afflict his holy heart with incredible grief. Not to mention other things, he saw in the family of Shem the sanctuary of God—into which the sons of Japheth were to be received—destroyed, or, at least, ruined and torn apart.

For since the father of Abraham himself, having forsaken his rightful position, had built for himself a profane tabernacle, a very small portion indeed remained of those who worshipped God in the unity of a pure faith. With what tormenting pains this terrible confusion affected him cannot be adequately expressed in words. Thus we can understand that his eyes of faith must have been exceptionally keen, that did not fail to see from afar the grace of God in preserving the Church, at that time overwhelmed by the wickedness of men.