A Glimpse At The Two Angels of the Grave
Prophet Muhammad (Salllahu alayhi wasalaam): When a dead person is buried two black-blue angels come to him. One of them is called Munkar and the other Nakeer. (Tirmidhi)
And know that when death approaches you it will be instant & least expected just like when Munkar & Nakeer, the 2 Angels, whose job will be to question you in your grave will be at your appointed time.
… And the two Angels will come to him, sit him up and ask him, “Who is your Lord?” He will say, “O, oh! I don’t know.” They will ask him, “What is your religion?” and he will say “O, oh! I don’t know.” They will ask him, “What do you say about this man (Prophet Muhammad) who was sent to you?” He will say, “O, oh! I don’t know!