And if there were a Quran, with which mountains could be moved or with which the earth could be cleaved asunder or with which the dead could be made to speak (even then they would not have believed). No! the command is wholly Allah’s. Then, do not those who believe know, that if Allah had willed He would have guided the whole of mankind? And as for those who do not believe, disaster will not cease to afflict them because of that which they do or it will alight near their houses until the promise of Allah comes to pass, Allah certainly does not go against His promise. (Al Quran, Surah Al Raad, Chapter 13: Verse 31)
This verse shall be understood in context with the following verses:
13-30: Thus We have sent you to a community, before whom other communities have passed away, that you may read to them that which We have communicated to you, yet they do not believe in the Beneficent (Allah). Say, “He is my Fosterer, there is no god except Him, in Him do I put my trust and to Him do I turn.”
13-31: And if there were a Quran, with which mountains could be moved or with which the earth could be cleaved asunder or with which the dead could be made to speak (even then they would not have believed). No! the command is wholly Allah’s. Then, do not those who believe know, that if Allah had willed He would have guided the whole of mankind? And as for those who do not believe, disaster will not cease to afflict them because of that which they do or it will alight near their houses until the promise of Allah comes to pass, Allah certainly does not go against His promise.
13-32: And messengers were certainly mocked at before you, but I gave (sufficient) time to those who did not believe, then I caught them. How then was my requital (of evil)?
Summarized Commentary:
Muhammed (PBH) had communicated the Quran to his community and declared that ‘There is no god except Allah (SWT)’ Even if miracles were performed through the Quran, the infidels would not believe because guidance too depends on the will of Allah (SWT), they will be punished for their evil deeds and rejecting the messengers of Allah (SWT).