Genesis 11:5-7 (New International Version)

 ⁵ But the LORD came down to see the city and the tower that the men were building. ⁶ The LORD said, "If as one people speaking the same language they have begun to do this, then nothing they plan to do will be impossible for them. ⁷ Come, let us go down and confuse their language so they will not understand each other."