Genesis 11:8

So the Lord scattered them abroad from thence upon the face of all the earth; and they left off to build the city. That was the consequence of the miracle. A great migration of families and tribes over the whole earth began, by which men were scattered to the four winds. The great project as planned naturally had to be abandoned. Even if some few people, whom we may now term Babylonians, remained in the city, to be conquered afterward by Nimrod, the purpose of the human race in its blasphemous pride was not realized.