20:113
وَكَذَٰلِكَ أَنزَلْنَٰهُ قُرْءَانًا عَرَبِيًّۭا وَصَرَّفْنَا فِيهِ مِنَ ٱلْوَعِيدِ لَعَلَّهُمْ يَتَّقُونَ أَوْ يُحْدِثُ لَهُمْ ذِكْرًۭا
And thus We have sent it down as an Arabic Qur'an and have diversified therein the warnings that perhaps they will avoid [sin] or it would cause them remembrance.
Translation · Saheeh International
Tafsir
Ibn Kathīr (abridged)
The Qur'an was revealed so that the People would have Taqwa and reflect
After Allah, the Exalted, mentions that on the Day of Judgement both the good and the evil will be recompensed and there is no avoiding it, He then explains that the Qur'an was revealed as a bringer of glad tidings and a warner in the clear and eloquent Arabic language. There is no confusion or deficiency in it.
وَصَرَّفْنَا فِيهِ مِنَ الْوَعِيدِ لَعَلَّهُمْ يَتَّقُونَ
(And thus We have sent it down as a Qur'an in Arabic, and have explained therein in detail the warnings, in order that they may have Taqwa of,) This means: so that they will leave off sins, forbidden things and lewd abominations.
أَوْ يُحْدِثُ لَهُمْ ذِكْراً
(or that it may cause them to have a lesson from it.) This means: to produce acts of obedience and deeds that will bring one closer to Allah.