Library Pseudo-Clement Recognitions
Book 1
Chapter 31: World After the Flood
In the eighteenth generation walled cities were built, armies were organized and armed, judges and laws were sanctioned, temples were built, and the princes of nations were adored as gods. In the nineteenth generation the descendants of him who had been cursed after the flood, going beyond their proper bounds which they had obtained by lot in the western regions, drove into the eastern lands those who had obtained the middle portion of the world, and pursued them as far as Persia, while themselves violently took possession of the country from which they expelled them. In the twentieth generation a son for the first time died before his father, Genesis 11:28 on account of an incestuous crime.
English translation by Thomas Smith, in Ante-Nicene Fathers, Vol. VIII (eds. Alexander Roberts, James Donaldson, and A. Cleveland Coxe; Buffalo: Christian Literature Publishing Co., 1886). Public domain. Digital text via New Advent Church Fathers.