Translation of the verse 31 from Surah Ar-Ra‘d : Number of verses 43 - - page 253 - Part 13.
And if there had been a Quran with which mountains could be moved (from their places), or the earth could be cloven asunder, or the dead could be made to speak (it would not have been other than this Quran). But the decision of all things is certainly with Allah. Have not then those who believe yet known that had Allah willed, He could have guided all mankind? And a disaster will not cease to strike those who disbelieve because of their (evil) deeds or it (i.e. the disaster) settle close to their homes, until the Promise of Allah comes to pass. Certainly, Allah does not fail in His Promise.
And if there was any qur'an by which the mountains would be removed or the earth would be broken apart or the dead would be made to speak, [it would be this Qur'an], but to Allah belongs the affair entirely. Then have those who believed not accepted that had Allah willed, He would have guided the people, all of them? And those who disbelieve do not cease to be struck, for what they have done, by calamity - or it will descend near their home - until there comes the promise of Allah. Indeed, Allah does not fail in [His] promise.
(13:31) And what (do you think) would have been the result, if We had sent a Qur'an that would have caused the mountains to move or cleft the earth asunder or made the dead speak? *47 (It is not difficult at all to show such Signs) for Allah has full power over everything. *48 Have the Believers (still any expectations of a Sign in answer to the demand of the disbelievers and) not given up all hope, (knowing) that Allah could have guided all mankind aright, *49 if He had so desired? As for the disbelievers, because of their misdeeds, one affliction or the other does not cease to visit them every now and then, or come near their home. It will go on like this untill Allah's threat come to pass. Indeed, Allah does not fail to bring about His threat.
*47) This verse has been addressed to the Believers who were feeling uneasy that no such Sign was being sent as was demanded by the disbelievers. They thought that such a Sign would convince the disbelievers and they would accept Islam. Therefore when no such Sign was sent, they became alI the more uneasy for the lack of the fulfilment of the demand that gave rise to doubts about the Prophethood of the Messenger. The question posed in this verse is meant to remove that uneasiness of the Muslims. It is like this: "Do you think that they would have embraced Islam if such and such Signs had been shown to them all of a sudden along with a Surah of the Qur'an ? Are you under the delusion that they are quite ready to accept Islam and are waiting only for such a Sign ? Do you think that those people who have failed to see the light of the Truth in the teachings of the Qur'an, in the phenomena of the universe, in the pure and spotless life of the Holy Prophet and in the wonderful change in the lives of his Companions, would see the light of the Truth in the moving of the mountains, in the cleavage of the earth and in the coming out of the dead from the graves?"
*48) "Allah has full power over everything" and can show any Sign if He so desires. He is not showing any Sign for it dces not fit in the scheme laid down for the guidance of Man. As the real object is to show Guidance to mankind through the Prophet and not to compel them to believe in the Prophethood of a Prophet, He desires that the people should gain guidance by thinking and observing wisely and not by seeing Signs.
*49) That is, "If the object had been to make human beings Believers even without consciously understanding it, Allah could have created them Believers by birth. "