Genesis 11:2-4

2And it came to pass as they journeyed from the east, that they found a plain in the land of Shinar, and dwelt there.

3And they said one to another, Come on, let us make bricks, and burn [them] thoroughly. And they had brick for stone, and they had asphalt for mortar.

4And they said, Come on, let us build ourselves a city and a tower, the top of which [may reach] to the heavens; and let us make ourselves a name, lest we be scattered over the face of the whole earth.