Surah Fusilat (The Verses Prefectly Explained), Verse 46

مَنْ عَمِلَ صَالِحًا فَلِنَفْسِهٖ وَمَنْ اَسَآءَ فَعَلَیْهَا وَمَا رَبُّكَ بِظَلَّامٍ لِّلْعَبِیْدِ ۟

Man 'amila salihan falinafsihee wa man asaaa'a fa'alaihaa; wamaa rabbuka bizallaamil lil 'abeed

“Whoever works righteousness benefits his own soul; whoever works evil, it is against his own soul: nor is Thy Lord ever unjust (in the least) to His Servants.”

Quran 41:46 (Yusuf Ali Translation)