The Hereafter is the final destiny of all worldly existence starting at the time of death. The day mankind will be resurrected from their graves then they shall be brought to accounts for their deeds whether goods or evil. Allah says:

"I (Allah) swear by the Day of Resurrection and I (Allah) swear by the self-reproaching soul. Does Man think that We shall not assemble his bones? Yes, We are able to put together in perfect order the tips of his fingers. Nay!(Man denies Resurrection and Reckoning) So he denies to continue committing sins. He asks,'When will be this Day of Resurrection?' So, when the sight shall be dazed and the moon will be eclipsed and the sun and the moon will be joined together. On that day man will say, 'Where is the place that I can flee to?' No! There is no refuge! Unto that your Lord(Alone) will be the place of rest that day. On that day men will be informed of what he sent forward (of evil or good deeds) and what he left behind(of his good or evil practices). Nay! Man will be a witness against himself. " (Quran)