According to Imam Sadeq (the 6th Shia Imam) when a believer dies, seventy thousand angels will accompany him to his grave and when he is placed in his grave , two angels called “Nakir” and “Monkar” will ask him same questions as: who is your God? What is your religion? Who is your prophet? And the believer will answer them.
“My God is Allah, my religion is Islam, and my prophet is Muhammad”:
Thus if he is one of those who are drown close (the surah “The Inevitable “ (56/88) [he will have] contentment, fragrance, and a garden of a bliss (56/89)
The Imam also said when a disbeliever dies seventy thousand angels coming from the Hell will accompany him to the grave , and the disbeliever ask them to tell him return to the world in order to become a believer:
My Lord! Send me back so I may act honorably wilt anything I may have left behind (23/99-100)
Then the angels tell them:
Indeed not! It is merely a remark he is making. (23/100)
Even though they were sent back, they would still return to what they have been forbidden (6/28)
When he is placed in the grave, the angels will ask him: who is your God? Who is your religion? Who is your prophet? And the disbeliever answers them: “I do not know”.
However of he is one the mistaken rejectors (56/92) a welcome of scalding water (56/93) plus q roasting in Hades [will await him] (56/94)
Death The Purgatory Believer Disbeliever Nakir and Monkar Divine reward Divine punishment The angels