Surah Fussilat 41:46

مَّنْ عَمِلَ صَـٰلِحًا فَلِنَفْسِهِۦ ۖ وَمَنْ أَسَآءَ فَعَلَيْهَا ۗ وَمَا رَبُّكَ بِظَلَّـٰمٍ لِّلْعَبِيدِ

Whoever does righteousness - it is for his [own] soul; and whoever does evil [does so] against it. And your Lord is not ever unjust to [His] servants.

Translation: Saheeh International

Tafsir

Whoever acts righteously it is for the good of his own soul that he acts thus and whoever does evil it is to the detriment thereof in other words the harm consequent from his evildoing will only be to him. …

Excerpt from Tafsir al-Jalalayn, commentary on 41:46, via Quran.com. The reader has the full commentary and 9 more tafsirs.