Book Name:Namaz Ki Ahmiyat
This well is for those who miss Salah, fornicators, alcoholics, those who take interest and those who hurt their parents. (Bahar-i-Shari'at, vol. 1, pp. 434; summarised)
Punishment of Hell and difficulties of the world
O devotees of the Messenger! Ghayy is the deepest and hottest valley in Hellfire. Now think, when the Hellfire starts to diminish and extinguish, this same valley has a well inside it, which is opened up to re-ignite Hellfire itself. Just think of how terrifyingly fearsome and hot this valley and well are. Now think further, what will those who missed their Salah go through, when they will be thrown into it? Remember! Hell is a place in which Allah reveals His wrath and anger. The way no human intellect can comprehend His endless mercy and blessings, similarly, none can comprehend His endless wrath and anger.
Anything painful you can think of; for example, plucking a living person’s nails using a tool, assaulting someone with a knife or baton, fracturing someone’s bones by driving a vehicle over his body, pouring salt over someone after severing his body parts, peeling the skin from the body of a living person, operating on someone without giving them anaesthesia, headaches, fevers, stomach aches, heart attacks, cancer, kidney stone pain, severe stress and all other diseases, calamities and hardships of this world, are completely insignificant in comparison to what punishment lies in Hellfire. In short, if all the illnesses and calamities of the world are inflicted upon a person, they are still not even equal to the slightest punishment of Hellfire.
The Messenger of Allah صَلَّى اللّٰهُ عَلَيْهِ وَاٰلِهٖ وَسَلَّم has said:
The one who will be afflicted with the lightest punishment of Hell, will be made to wear shoes of fire. Due to this, his brain will boil the way a copper pot boils. He would be under the impression that he is subjected to the severest of the punishments, whereas this is the lightest punishment he can face. (Muslim, Kitab al-Iman, pp. 111, Hadith 517)
O devotees of the Messenger! We should become fearful regarding Hellfire