And every soul will be fully compensated [for] what it did; and He is most knowing1 of what they do.
Translation: Saheeh International (English)
1 With no need for any record or witnesses, which are but means to establish proof to the soul itself in addition to its own knowledge of what it has done.
Allah will give each soul its recompense in full, whether its actions were good or evil. Allah knows best what they do. Nothing of their actions, whether good or bad, is hidden from Him and He will give them the recompense of their actions on this day.