Surah Al-Isra 17:9

إِنَّ هَـٰذَا ٱلْقُرْءَانَ يَهْدِى لِلَّتِى هِىَ أَقْوَمُ وَيُبَشِّرُ ٱلْمُؤْمِنِينَ ٱلَّذِينَ يَعْمَلُونَ ٱلصَّـٰلِحَـٰتِ أَنَّ لَهُمْ أَجْرًا كَبِيرًا

Indeed, this Qur’ān 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

Translation: Saheeh International

Tafsir

Truly this Qur’ān guides to that to that way which is straightest most upright and correct and gives tidings to the believers who perform righteous deeds that there is a great reward for them.

Excerpt from Tafsir al-Jalalayn, commentary on 17:9, via Quran.com. The reader has the full commentary and 9 more tafsirs.