18:2
قَيِّمًا لِّيُنذِرَ بَأْسًا شَدِيدًا مِّن لَّدُنْهُ وَيُبَشِّرَ ٱلْمُؤْمِنِينَ ٱلَّذِينَ يَعْمَلُونَ ٱلصَّـٰلِحَـٰتِ أَنَّ لَهُمْ أَجْرًا حَسَنًا
qayyiman liyundhira basan shadīdan min ladun'hu wayubashira l-mu'minīna alladhīna yaʿmalūna l-ṣāliḥāti anna lahum ajran ḥasanan
warning of severe punishment from Him, and [giving] glad news to the believers who do good deeds––an excellent reward
(He has made it) straight to give warning (to the disbelievers) of a severe punishment from Him, and to give glad tidings to the believers (in the Oneness of Allâh - Islâmic Monotheism), who do righteous deeds, that they shall have a fair reward (i.e. Paradise).