Al-Ahqaf 46:19

Walikullin darajatun mimmaAAamiloo waliyuwaffiyahum aAAmalahum wahum la yuthlamoon

And for all there are degrees [of reward and punishment] for what they have done, and [it is] so that He may fully compensate them for their deeds, and they will not be wronged.

For each (of these two groups) there are (different) ranks because of what they did, and so that He may repay them in full for their deeds; and they will not be wronged.