Therefore, although it is written, "And Cain knew his wife, and she conceived and bare Enoch, and he builded a city and called the name of the city after the name of his son Enoch," it does not follow that we are to believe this to have been his first-born; for we cannot suppose that this is proved by the expression "he knew his wife," as if then for the first time he had had intercourse with her. For in the case of Adam, the father of all, this expression is used not only when Cain, who seems to have been his first-born, was conceived, but also afterwards the same Scripture says, "Adam knew Eve his wife, and she conceived and bare a son, and called his name Seth." Whence it is obvious that Scripture employs this expression neither always when a birth is recorded nor then only when the birth of a first-born is mentioned. Neither is it necessary to suppose that Enoch was Cain's first-born because he named his city after him. For it is quite possible that though he had other sons, yet for some reason the father loved him more than the rest. Judah was not the first-born, though he gives his name to Judæa and the Jews. But even though Enoch was the first-born of the city's founder, that is no reason for supposing that the father named the city after him as soon as he was born; for at that time he, being but a solitary man, could not have founded a civic community, which is nothing else than a multitude of men bound together by some associating tie. But when his family increased to such numbers that he had quite a population, then it became possible to him both to build a city, and give it, when founded, the name of his son. For so long was the life of those antediluvians, that he who lived the shortest time of those whose years are mentioned in Scripture attained to the age of 753 years. And though no one attained the age of a thousand years, several exceeded the age of nine hundred. Who then can doubt that during the lifetime of one man the human race might be so multiplied that there would be a population to build and occupy not one but several cities? And this might very readily be conjectured from the fact that from one man, Abraham, in not much more than four hundred years, the numbers of the Hebrew race so increased, that in the exodus of that people from Egypt there are recorded to have been six hundred thousand men capable of bearing arms, and this over and above the Idumæans, who, though not numbered with Israel's descendants, were yet sprung from his brother, also a grandson of Abraham; and over and above the other nations which were of the same stock of Abraham, though not through Sarah,—that is, his descendants by Hagar and Keturah, the Ishmaelites, Midianites, etc.