Torture In Graves

A Muslim who does sinful acts is called fasiq [1]. Fasiqs and all disbelievers will be tortured ('adhab) in their graves. These are certainly to be believed. After interment, the deceased will return to an unknown life and will be either in blessings or in torture. As it was declared in hadith ash-sharifs [2], two angels named munkar and nakir, in the guise of two unknown horrible people, will come to his grave and question him. Questions in the grave will be on some fundamentals of iman (belief) according to some scholars or on the whole of iman to some others. For this reason, we should teach our children the answers to the following questions: Who is your rabb (Allah)? What is your religion? Whose umma (which prophet's community) do you belong to? What is [the name of] your Holy Book? What is your qibla? What are your madhhabs [3] in iman and in 'ibadat (worshippings or 'amal)?

It is written in Tadhkirat al-Qurtubi that those who are not Ahl as-Sunna [4] will not be able to answer correctly. The graves of those who will give precise answers will enlarge and a window will be opened to Paradise. Every morning and every evening they will see their places in Paradise, and angels will do them favours and give them good news. He who cannot answer precisely will be beaten with iron mallets so severely that every creature but mankind and genies will hear him cry out. His grave will become so tight that he will feel as if his bones would intertwine. A hole will be opened to Hell. In the morning and in the evening he will see his place in Hell. He will be tortured bitterly in his grave

[1] fasiq: sinful believer, sinner.
[2] hadith (sharif): i) a saying of the Prophet ('alaihi 's-salam).; al-Hadith ash-sharif: all the hadiths as a whole; ii) 'ilm al-hadith; iii) Books of the hadith ash-sharif. iv) Al-hadith al-qudsi, as-sahih, al-hasan: kinds of hadiths (for which, see Endless Bliss, II).
[3] madhhab: all of what a profound 'alim of (especially) Fiqh (usually one of the four-Hanafi, Shafi'i, Maliki, Hanbali) or iman (one of the two, namely Ash-ari, Maturidi) communicated.
[4] Ahl as-Sunna (wa'l-Jama'a): the true pious Muslims who follow as-Sahabat al-kiram. These are called Sunni Muslims. A Sunni Muslim adapts himself to one of the four Madhhabs. These madhhabs are Hanafi, Maliki, Shafi'i and Hanbali.
till the Resurrection.