THE LORD SAID - The Holy One, Blessed is He, said: ALL HAVING ONE LANGUAGE - Each understood what his fellow would say to him, whether 'clay' or 'brick,' and this way they would build. During the time that they had one language, they were not restrained from building. Rather, I will confuse their languages and they will put aside the construction. What did G-d do? He called the divine messengers and commanded them to descend below, and each one [of the messengers would teach] each family a different language, so that this family would not understand that family. And so they did, as it says, "Come, let us descend."