وَوُفِّيَتْ كُلُّ نَفْسٍ مَّا عَمِلَتْ وَهُوَ أَعْلَمُ بِمَا يَفْعَلُونَ Qur’an Az-Zumar (39:70)Wawuffiyat kullu nafsin m a AAamilat wahuwa aAAlamu bim a yafAAaloon a
Cf. {99:7-8}, "he who shall have done an atom's weight of good, shall behold it; and he who shall have done an atom's weiaht of evil, shall behold it".
In an earthly court, a decision may possibly go wrong because the judge is deceived; here no deceit or mistake will be possible, for Allah knows all, and knows it better than any one else can.