31أَلَم يَرَوا كَم أَهلَكنا قَبلَهُم مِنَ القُرونِ أَنَّهُم إِلَيهِم لا يَرجِعونَ(Muntakhab)Do they not perceive by sight, apprehend by thought and learn by reading how many generations who existed before them We have destroyed and they had gone whence they shall not return!