Genesis 11:3-5

And they said one to another, Come, let us make brick, and burn them thoroughly. And they had brick for stone, and slime had they for mortar. 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.