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 Jabir that Nu'man b. Qaufal came to the Holy Prophet (may peace be upon him) and said: Would I enter Paradise if I say the obligatory prayers and deny myself that which is forbidden and treat that as lawful what has been made permissible (by the Shari'ah)? The Holy Prophet (may peace be upon him) replied in the affirmative.