إِنَّ هـٰذَا القُرآنَ يَهدي لِلَّتي هِيَ أَقوَمُ وَيُبَشِّرُ المُؤمِنينَ الَّذينَ يَعمَلونَ الصّالِحاتِ أَنَّ لَهُم أَجرًا كَبيرًا (9)

Indeed, this Qur'an guides to that which is most suitable and gives good tidings to the believers who do righteous deeds that they will have a great reward.