And the whole earth was of one language (Gen. 11:1). Scripture states elsewhere in allusion to this verse: Slay them not, lest my people forget, make them wander to and fro by Thy power, and bring them down, O Lord our shield. For the sin of their mouth, and the words of their lips (Ps. 59:12). David uttered this verse in reference to Doeg and Ahithophel. He cried out to the Holy One, blessed be He: Master of the Universe, slay them not as you do other men, lest my people forget the miracles you performed (in my behalf). Make them instead to wander to and fro under Your control so that they may roam about in this world. And bring them down, that is, from their exalted position. Why? For they have rebelled against You.
For the sin of their mouth (ibid.). They sinned with their mouths and through the words of their lips. Doeg said: I saw the son of Jesse coming to Nob, to Ahimelech the son of Ahitub, (I Sam. 22:9), and Ahithophel said unto Absalom: Go into thy father’s concubines, that he hath left (II Sam. 16:21).
Another explanation of this verse. David said this in reference to the generation of the separation. Slay them not, lest my people forget that You have destroyed the generation of the flood. Rather, make them wander to and fro by Thy power, that is, scatter them throughout the world, as it is written: The Lord dispersed them from there (Gen. 11:8). Bring them down, because they said: Let us build a city (ibid., v. 4). What does this suggest? They were rebelling against You.