And the infidels said, 'We shall never believe, in this Quran and nor in those books which were before it.' And if you could see when the unjust will be made to stand before their Lord; they shall cast back the word one against the other, those who were pressed will say to those who were swelled with pride, 'if you had not been, we would surely have believed.' [34:31]
It is narrated on the authority of Aswad b. Hilal that he heard Mu'adh say this: The Messenger of Allah (may peace be upon him) called, me and I replied to him. He (the Holy Prophet) said: Do you know the right of Allah upon the people? and then followed the hadith (mentioned above).