Had there been a Qur'ân whereby mountains could be moved, or whereby the earth could be torn asunder, or whereby the dead could be made to speak (it is this very Qur'ân indeed). Behold! the commandment and all power belongs to Allâh. Have not those who believe realized yet that if Allâh had (enforced) His will He would have indeed guided all mankind. And as for those who disbelieve, one calamity or the other will continue to befall them owing to their (evil) activities till you come to alight in their neighborhood, until the promise of Allâh (about the conquest of Makkah) comes to pass. Verily, Allâh will not fail (this) promise (of His).