قَيِّمًا لِّيُنذِرَ بَأْسًا شَدِيدًا مِن لَّدُنْهُ وَيُبَشِّرَ الْمُؤْمِنِينَ الَّذِينَ يَعْمَلُونَ الصَّالِحَاتِ أَنَّ لَهُمْ أَجْرًا حَسَنًا
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سورة الكهف
(18/2) Straightforward, that it may warn of a severe violence from before Him, and bring glad tidings to the believers who work righteous works that theirs shall be a goodly hire.
Surah Al-Kahf