Genesis 11:4-6

And they said, Come, let us build us a city, and a tower, whose top may reach unto heaven, and let us make us a name; lest we be scattered abroad upon the face of the whole earth. And Jehovah came down to see the city and the tower, which the children of men builded. And Jehovah said, Behold, they are one people, and they have all one language; and this is what they begin to do: and now nothing will be withholden from them, which they purpose to do.