Genesis 41:46

Joseph was thirty years old So that his life had been a life of humiliation and suffering for about thirteen years. But the season of peculiar and great affliction, whereby his faith and patience, and all his graces, had been tried to the uttermost, had prepared him for his subsequent exaltation, which was of much longer duration, even for the space of eighty years. His age may also, perhaps, be mentioned here, to signify that his great wisdom, when he stood before Pharaoh, was not the fruit of long and large experience, but was the singular gift of God.