Abu Hurairah (radiAllahu anhu) narrated: "When Allah's Messenger (salAllahu alayhi wasalam) said, 'Your ordinary fire is one of the 70 potions of the Hellfire,' someone commented, 'O Messenger of Allah, would it (ordinary fire) not be sufficient (to burn the wrongdoers)?' At that, Allah's Messenger (SAW) said, 'The Hellfire has 69 more portions than ordinary (worldly) fire, and all of them are as hot as this (worldly fire).'"
"Verily, Allah has cursed the disbelievers and prepared for them a Blazing Fire. Dwelling therein forever, and they will find no protector or helper."
[al-Ahzab, 33: 64-65]
"But he who is given his record behind his back will soon cry for destruction, and he will enter a blazing Fire."
[al Inshiqaq, 84: 10-12]
"No, they deny the Hour (of the judgment to come), but We have prepared a blazing fire for such as deny the Hour. When it sees them from a far off place, they will hear its fury and its raging sigh. And when they are cast, bound, in chains, into constricted place therein, they will plead therein for destruction. Do not plead today for a single destruction; plead for destruction oft-repeated."
[al-Furqan, 25: 11-14]
"The companions of the left hand - what are the companions of the left hand? (They will be) in the midst of a fierce blast (of fire) and in boiling water."
[al Waqi'ah, 56: 41-42]
"But, he whose scales are light his home will be a pit. And what will make you understand what that is? (It is ) a fire, blazing fiercely."
[al Qari'ah, 101: 8-11]
"Soon will I cast him into Saqar (the Hellfire). And what will explain to you what Saqar is? It permits nothing to endure, and it leaves nothing alone, darkening and changing the color of man."
[al Muddaththir, 74: 26-29]
"Their abode will be Hell. Every time it abates. We will increase for them the blaze (the fierceness) of the fire."
[al Isra, 17: 97]
"Those are the ones, who have exchanged the Hereafter for the gains of this worldly life. The punishment will not be lightened for them, and they will not be aided."
[al Baqarah, 2: 86]
"So taste, (the result of your deeds), for We will not increase you except in punishment."
[an Naba, 78: 30]
Anas (radiAllahu anhu) reported that the Messenger of Allah (salAllahu alayhi wasalam) said: "The most favored man among the dwellers of the Earth will be brought from among the people of the Fire on the Day of Resurrection. He will be dyed in the Fire but once, and then it will be said to him, 'O son of Adam, have you ever seen good at all? Has any pleasure ever come to you?' He will say, 'No, by Allah, O Lord.' Then the most miserable people in the world will be brought from the people of Paradise and will be dyed with the dye of Paradise. It will be said to him, 'O son of Adam, have you ever seen any misery, and has any hardship ever come to you? ' He will say, 'No, by Allah, O my Lord. No misery ever came to me, nor did I see any hardship.'"