There are many whose tongues would cease to answer the questions put forth to them, and would not be able to answer, or would reply wrongly. It also happens that in reply to the question "Who is your Lord?", the person will reply to the Angels that they (i.e the Angels) are his lord. The person who is well acquainted in his life time with the beliefs and principals (of Islam) will be able to answer without trouble. And if he does so, his grave will be broadened to the length his sight reaches. The period of Barzakh' passes away easily with Allah's blessings, and the Angels proclaim to him, : "Sleep thou like a newly wedded bride". (Usoole Kafi) If the dead man is a non believer or a hypocrite, and cannot answer the questions put forth to him, one of the doors of hell is opened in his grave, and the entire grave is filled with the raging-fire. As Allah says in the Qu'ran: "And if he be of those who have belied, gone astray, He shall have an entertainment of a boiling water, And the boiling in the hell -fire" (surah -al Waqe'ah: 92-94). Imam Ja'far-as-Sadiq (A.S.) says that, "A person who denies the following, is not one of our Shi'ahs: (1) Ascension (Me'raj of the Holy Prophet), (2) Questioning in the grave, and (3) Our Intercession (Shafa'at).
It is related that two Angels having a fearful countenance enter the grave for the questioning, their voices are like thunder, and their eyes like lightening. They