Genesis 11:5-9

But when YAHWEH came down to see the city and the tower which mortals had started building, he said, “If they have begun this as one people sharing a common language, then nothing they plan to do will be impossible for them. Come, let us go down and confuse their language and prevent them from understanding each other.” So YAHWEH scattered them over the entire earth, and they stopped building their city. That is why the city was called Babel—because it was there that YAHWEH confused the language of the whole world and from there the people were scattered over the face of the earth.