The noble Quran says:-(41:19) Imagine the Day when Allah's enemies will be mustered to the Fire,23 and the people of the former times will be detained until the arrival of people of the later times,24
Expalanation:-*23 What is meant to be said have is: "When they will be rounded up to be presented in the Court of Allah," though the words used are to the effect: "When they will be gathered to be driven to Hell," for Hell in any case will be their final destination.
*24 That is, All the former and latter generations and races will be gathered together at a time and called to account together, For whatever a person does in his lifetime, whether good yr evil, its influence and impact dces not end with his life; but continues to operate even after his death for long periods of time, for which he is totally responsible. Likewise, whatever a generation does in its own time, its influence continues to affect the later generations for. centuries, and it is responsible for its heritage. It i ...more

Munkir/Nakir

Reward or punishment is based upon intention of the deeds. Everyone gets what he/she has intended for. You and I may not be able to see the real intention behind a deed be it good or bad but God knows the true intentions of a person and we'll be judged accordingly.