As-Salaam alaikum, Yes, belief in the Day of Resurrection.. or the Last (Judgement) Day, is one of the 6 pillars of faith in Islam... preached by all Prophets sent to Man. And:-- Surely, we will be "gathered together on the Day of Resurrection about which there is no doubt". (4:87) And related to this, DEATH we have to face sooner or later. Just what is death? What is the Grave?.. what happens in the grave before the day of Ma'ashar? Towards having some clear perception of all this and more, may I invite your attention to the attached files on these important matters, for your study. Find time to open/study both files on The Day of Resurrection and Death, the Grave and what happens after death. You will be glad you did. These are:-- (1) "The Day Of Resurrection in Light of Qur'an and Sunnah," by Dr. Umar al-Ashqar. (2) "Sharhur Sudoor", by Imam Jalaludden Suyuti. It discusses death, the grave, what happens in the grave, taste of death etc.