Sura an-Naba explains about the Day of Judgment. It is an inevitable event which will occur at an appointed time. There is no need to have a doubt over it by the disbelievers and their arguments in this context are pointless.

The disbelievers are reminded about the mammoth events that are taking place in their lives on day to day basis. With these in view, there is no basis whatsoever to disbelieve about the Day of Judgment.

There are three verses in Quran about the dwellers of Hell, as follows.

It is in Quran - إِنَّ اللَّهَ لَعَنَ الْكَافِرِينَ وَأَعَدَّ لَهُمْ سَعِيرًا - خَالِدِينَ فِيهَا أَبَدًا [ Indeed, Allah's curse is on the disbelievers and He has prepared for them a Blaze (of Hell) where they will live for ever]. (Al-Ahzab - 64)

It is in Quran - وَالَّذِينَ كَفَرُوا وَكَذَّبُوا بِآيَاتِنَا أُولَـٰئِكَ أَصْحَابُ النَّارِ خَالِدِينَ فِيهَا ۖ وَبِئْسَ الْمَصِيرُ [ But the ones who disbelieved and denied Our verses, those are the companions of the Fire, abiding therein. And (what a) wretched is that destination.] (At-Taghaabun - 10)

It is in Quran - إِنَّ جَهَنَّمَ كَانَتْ مِرْصَادًا - لِلطَّاغِينَ مَآَبًا - لَابِثِينَ فِيهَا أَحْقَابًا [ (Know that) Hell has been lying in wait, as a home for the transgressors, to stay therein for a long long time. ] (An-Naba - 21-23)

It is part of our Iman that the dwellers of Hell and Paradise will remain there for ever. There is no concept of death in Paradise or in Hell. However, some sinners will be punished in Hell for sometime and later, from Prophet Mohammad's (صلى الله عليه و آله وسلم) mediation, they will be taken out of Hell and transferred to Paradise. Anyone who has an atom's weight of Iman in his heart will be taken out of Hell and transferred to Paradise. After that the doors of the Paradise and Hell will be closed and the dwellers in both Hell and Paradise are separated from each other for ever.

There are differences of opinion among scholars on the punishment of the dwellers of Hell, as follows:

(i) Some say that when there is no Iman in heart, there is no scope of respite in the punishment of the Dwellers of Hell. It is eternal, continuous and unending.

(ii) In some scholars' opinion, after a long long time of punishment of the dwellers of Hell, Allah's Mercy will overcome His rage and their covenant to their Lord will help them and they will be pardoned by the Most Merciful Allah (عَزَّ وَجَلَّ). The Fire of the Hell will get extinguished and some kind of relief and comfort will be provided to them in Hell itself, but they will not be transferred to Paradise.

It is in Hadith - It is reported on the authority of Abu Huraira (رضئ اللہ تعالی عنہ) that the Apostle of Allah (صلى الله عليه و آله وسلم) said, when Allah completed the creation, he wrote in his book with him upon the throne, 'Verily, My Mercy prevails over my Wrath. (Bukhari, Muslim)

It is in Quran - وَإِذْ أَخَذَ رَبُّكَ مِنْ بَنِي آَدَمَ مِنْ ظُهُورِهِمْ ذُرِّيَّتَهُمْ وَأَشْهَدَهُمْ عَلَى أَنْفُسِهِمْ أَلَسْتُ بِرَبِّكُمْ قَالُوا بَلَى شَهِدْنَا أَنْ تَقُولُوا يَوْمَ الْقِيَامَةِ إِنَّا كُنَّا عَنْ هَذَا غَافِلِينَ [ And (mention) when your Lord took from the children of Adam (عليه السلام), from their loins, their descendants and made them testify of themselves, 'Am I not your Lord?' They said, 'Yes, we have testified.' Lest you would say on the day of Resurrection, 'Indeed, we were unaware of it.' ] (Al-A'raaf - 172)

Allah (عَزَّ وَجَلَّ) and His Apostle (صلى الله عليه و آله وسلم) know best.

To seek the truth about our Creator, know about Him and follow His commandments is part of the nature of human beings. A person who follows Taghut (Devils) and evil desires, is indeed going against his own nature. If you go against your own nature, surely you will suffers in this world and in Hereafter. It is important that we realize this fact.

Who has instilled this nature in us? It is Allah (عَزَّ وَجَلَّ), our Creator who has instilled in us the drive to seek truth.

It is in Quran - وَإِذْ أَخَذَ رَبُّكَ مِنْ بَنِي آَدَمَ مِنْ ظُهُورِهِمْ ذُرِّيَّتَهُمْ وَأَشْهَدَهُمْ عَلَى أَنْفُسِهِمْ أَلَسْتُ بِرَبِّكُمْ قَالُوا بَلَى شَهِدْنَا أَنْ تَقُولُوا يَوْمَ الْقِيَامَةِ إِنَّا كُنَّا عَنْ هَذَا غَافِلِينَ [ And (mention) when your Lord took from the children of Adam (عليه السلام), from their loins, their descendants and made them testify of themselves, 'Am I not your Lord?' They said, 'Yes, we have testified.' Lest you would say on the day of Resurrection, 'Indeed, we were unaware of it.' ] (Al-A'raaf - 172)

Where was the above promise made? It was in Aalam-e-Mithaal. It is obvious from the above verse that it is part of our nature to seek the truth about our Creator and walk on His way. Why it is so? It is because, it is part of our nature. To assist us in following His path, Allah (عَزَّ وَجَلَّ) has sent many Prophets/Apostles who have guided us on His way.

It is in Quran - وَلَقَدْ بَعَثْنَا فِي كُلِّ أُمَّةٍ رَّسُولًا أَنِ اعْبُدُوا اللَّهَ وَاجْتَنِبُوا الطَّاغُوتَ ۖ فَمِنْهُم مَّنْ هَدَى اللَّهُ وَمِنْهُم مَّنْ حَقَّتْ عَلَيْهِ الضَّلَالَةُ ۚ فَسِيرُوا فِي الْأَرْضِ فَانظُرُوا كَيْفَ كَانَ عَاقِبَةُ الْمُكَذِّبِينَ [And We certainly sent into every nation an Apostle, (saying), 'Worship Allah and avoid Taghut' (devils). And among them were those whom Allah guided, and among them were those upon whom error was (deservedly) decreed. So proceed through the Earth and observe how was the end of the deniers (who followed Taghut). ] (An-Nahl - 36)

Every Prophet took solemn pledges from their followers individually and collectively on the instance of Allah (عَزَّ وَجَلَّ). Prophet Mohammad (صلى الله عليه و آله وسلم) also took collective and individual pledges from Sahabah.

Excessive attention on the comforts of the world and allowing the carnal desires to rule over their hearts makes people forget about the purpose of their coming into this world which was to recognize their creator, their true Lord and worship Him earnestly.

It is in Quran - وَمَا خَلَقْتُ الْجِنَّ وَالْإِنسَ إِلَّا لِيَعْبُدُونِ [ And I did not create the jinn and mankind except to worship Me. ] (Adh-Dhaariyat - 56)