Perfect Divine Attributes

فَٱلْيَوْمَ لَا تُظْلَمُ نَفْسٌ شَيْـًٔا وَلَا تُجْزَوْنَ إِلَّا مَا كُنتُمْ تَعْمَلُونَ

So today [i.e., the Day of Judgement] no soul will be wronged at all, and you will not be recompensed except for what you used to do.