Surat Al Isra' (9-10)

{إِنَّ هَذَا الْقُرْآنَ يِهْدِي لِلَّتِي هِيَ أَقْوَمُ وَيُبَشِّرُ الْمُؤْمِنِينَ الَّذِينَ يَعْمَلُونَ الصَّالِحَاتِ أَنَّ لَهُمْ أَجْراً كَبِيراً} (الإسراء: 9 )

9- Indeed, this Qur'an guides people to the best ways and the clearest regarding all their affairs, for it is a comprehensive life-system and bearer for good news to the believers who abide by its rulings that they shall have a great reward.

{وأَنَّ الَّذِينَ لاَ يُؤْمِنُونَ بِالآخِرَةِ أَعْتَدْنَا لَهُمْ عَذَاباً أَلِيماً} (الإسراء: 10 )

10- This Qur'an warns those who do not believe in resurrection, reckoning, Paradise and Hell-Fire against a severe torment as a result of abandoning the religion of Allah behind their backs.