قَيِّمًا لِّيُنذِرَ بَأْسًا شَدِيدًا مِّن لَّدُنْهُ وَيُبَشِّرَ الْمُؤْمِنِينَ الَّذِينَ يَعْمَلُونَ الصَّالِحَاتِ أَنَّ لَهُمْ أَجْرًا حَسَنًا
[a Book] upright, to warn of a severe punishment from Him, and to give good news to the faithful who do righteous deeds, that there shall be for them a good reward,
Agha Ali Puya Commentary
Commentary on Quran 18:2
[Pooya/Ali Commentary 18:2] (see commentary for verse 1)