"No food will there be for them except bitter dhari (a thorny plant), which will neither nourish nor satisfy hunger."
[Surah al-Ghashiyah, 88: 6-7]
"Verily, the tree of Zaqqum will be the food of the sinful. Like molten brass it will boil in their insides like the boiling of scalding water."
[ad-Dukhan, 44: 43-46]
"Is that (Paradise) the better hospitality or the tree of Zaqqum? For We have truly made it as a torment for the wrongdoers. For it is a tree that springs out of the bottoms of Hellfire; the shoots of its fruit-stalks are like the heads of devils. Truly they will eat from it and fill their bellies with it. Then on top of that they will be given a mixture of boiling water."
[as-Saffat, 37: 62-67).
"Then will you truly ľO you who have gone astray an denied - you will surely eat of the trees of Zaqqum. Then will you fill your stomachs with it and drink boiling water on top of it, and you will drink boiling water on top of it, and you will drink like diseased camels, raging with thirst. Such will be their hospitality on the Day of Requital."
[al-Qaqi'ah, 56: 51-56]
"With Us are yokes (to bind them) and fire (to burn them) and food that chokes and a grievous punishment."
[al-Muzzammil, 73: 12-13]
"So he has no friend here this Day, nor does he have any food except what comes from the washing of wounds, which none will eat except the sinners."
[al Haqqah, 69: 35-37]
"Thus, All this. But indeed for the oppressors will be an evil place of final return. It is Hellfire - they will burn therein, and how evil is that bed, Thus, then will they taste it - a boiling fluid and a filthy fluid of pus and blood and other penalties of a similar kind to match them."
[Sad, 38: 55-58]
Ibn Abbas (radiAllahu anhu) reported: "The Messenger of Allah (salAllahu alayhi wasalam) recited the following verse: 'Fear Allah with the fear due to Him, and do not die except as Muslims.' Then he said, 'If a drop of Zaqqum would have fallen into a house in this world, it would have spoiled all the provisions of the people of this world. Then how will it be with one whose food it has become?'"
[at-Tirmidhi, Surah ali'-Imran, 3: 102]
"Those who unjustly eat up the property of orphans are only eating fire into their bellies. They will soon be driven into a blazing fire."
[an-Nisa, 4: 10]
"Truly, those who conceal what Allah has revealed from the scripture and exchange it for a small price - they are not taking into their stomachs except fire. Allah will not speak to them on the Day of Judgment, and He will not purify them. And they will have a painful punishment."
[al-Baqarah, 2: 174]