In The Name of Allaah, The Most Merciful, The Bestower of Mercy.
فَذُوقُواْ فَلَن نَّزِيدَكُمۡ إِلَّا عَذَابًا
So taste you (the results of your evil actions); no increase shall We give you, except in torment. [78:30]
At-Tabaree (rahimahullaah) said: He – the Majestic- says: It will be said to those Disbelievers in the Hell-Fire, when they drink the boiling fluid and foul pus: Taste, O people, the Punishment of Allaah which you used to deny in the worldly life; because We will not give you anything except increase in punishment, on top of the punishment which you are already suffering. It will not be reduced for you, nor will it be made any easier for you to bear.
Abdullaah ibn Amr -radiyallaahu-anhu ‘anhumaa- said: “No Ayah has been sent down which is more severe upon the inhabitants of the Fire than this Aayah: [فَذُوقُواْ فَلَن نَّزِيدَكُمۡ إِلَّا عَذَابًا – So taste you (the results of your evil actions); no increase shall We give you, except in torment].
So they will continually have their punishment increased, forever.
[Source: Explanation of Juz ‘Amma Series 35-36’ by Ustaadh Abu Talhah (may Allaah grant him and his wife Jannatul Firdaws….Aameen]