SHAFAQNA – It is narrated from Imam Hassan Askari (AS) who said: I heard that Imam Sadeq (AS) was asked to describe death and he replied: For the believer the smell of death is the most pleasant smell, as the believer is revived by its pleasant smell, and sleeps comfortably, and is relieved from all pains and sufferings. And death for the unbeliever is like the bite from viper and scorpion sting, perhaps worse than that [1].
[1] Beharul Anwaar, Vol. 6, Page 152.