Irenaeus: Demonstration of the Apostolic Preaching

23. And they arose and came from the land of the east; and, as they went through the land, they chanced upon the land of Shinar, which was exceeding broad; where they took in hand to build a tower. They sought means thereby to go up to heaven, and be able to leave their work as a memorial to those men who should come after them. And the building was made with burnt bricks and bitumen: and the boldness of their audacity went forward, as they were all of one mind and consent, and by means of one speech they served the purpose of their desires.

But that the work should advance no further, God divided their tongues, that they should longer be able to understand one another. And so they were scattered and planted out, and took possession of the world, and dwelt in groups and companies each according to his language: whence came the diverse tribes and various languages upon the earth. So then, whereas three races of men took possession of the earth, and one of them was under the curse, and two under the blessing, the blessing first of all came to Shem, whose race dwelt in the east and held the land of the Chaldeans.