Will humans live in the after-life forever or for only as long as Allah wishes ? What is the Islamic belief regarding this ?

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Praise be to Allaah. Allaah has decreed that this world will come to an end, and He has decreed that its people will die. Allaah says (interpretation of the meaning): “Whatsoever is on it (the earth) will perish.And the Face of your Lord full of Majesty and Honour will remain forever”[al-Rahmaan 55:26-27]