Once Rasulullah (sallallah alaihi wasallam) came to the masjid for salah, where he saw some people laughing and giggling. He said: “If you remembered your death, I would not see you like this. Think of your death often. Not a single day passes when the grave does not call out, ‘I am a wilderness, I am a place of dust, I am a place of worms. When a mu’min is laid in the grave, it says, Welcome to you. It is good of you to have come into me. Of all the people walking on the earth, I liked you best. ‘Now that you have come into me, you will see how I entertain you. ‘I then expands as far as the occupant can see. A door from Jannah is opened for him in the grave and through this door, he gets the fresh and fragrant air of Jannah.”
Note:- Fear of Allah ta’ala is the basic and essential qualification of a Muslim. Rasulullah (sallallahu alaihi wasallam) advised the believers to remember death, occasionally, to keep the fear of Allah ta’ala ever present in their hearts.