According to authentic narrations, Munkar and Nakeer are two angels who will question each person following their death. The Prophet (PBUH) was reported to have said: “When a dead man is buried, two bluish-black angels will come to him. One of them is called Munkar and the other Nakeer. They will ask, ‘What did you used to say about this man?’ If he was a believer, he will reply, ‘He is the servant of Allaah and His messenger…’ ” rated authentic (hasan) by al-Albaanee in Silsilah al-Ahaadeeth as-Saheehah vol. 3, no. 1391, pp. 379-380.