Surah Al-Jathiyah 45:15

مَنْ عَمِلَ صَـٰلِحًا فَلِنَفْسِهِۦ ۖ وَمَنْ أَسَآءَ فَعَلَيْهَا ۖ ثُمَّ إِلَىٰ رَبِّكُمْ تُرْجَعُونَ

Whoever does a good deed - it is for himself; and whoever does evil - it is against it [i.e., the self or soul]. Then to your Lord you will be returned.

Translation: Saheeh International

Tafsir

Whoever acts righteously it is for the benefit of his own soul that he acts so and whoever does evil it is to the detriment thereof that he has done evil; then to your Lord you will be returned with your Lord you shall end up whereupon He will requite the one of righteous deeds and the evildoer.

Excerpt from Tafsir al-Jalalayn, commentary on 45:15, via Quran.com. The reader has the full commentary and 9 more tafsirs.