Genesis 11:5-7

5But the Lord came down to see the city and the tower. He saw that the people had started to build them.

6The Lord said, ‘Because they all speak the same language, they are able to do this. If they can do this together, they may decide to do whatever they want.

7Now we must go down to them. We must make their language become confused. Then they will not be able to understand each other.’