قَيِّمًا لِيُنذِرَ بَأسًا شَديدًا مِن لَدُنهُ وَيُبَشِّرَ المُؤمِنينَ الَّذينَ يَعمَلونَ الصّالِحاتِ أَنَّ لَهُم أَجرًا حَسَنًا

It is invaluable—to warn of severe punishment from Him, and as good news to the believers who do righteous deeds, that for them is a good reward.