There will be sent against you both, Shuwaz of fire and Nuhas, and you will not be able to defend yourselves.
Ali bin Abi Talhah reported from Ibn Abbas that Shuwaz is the flame of fire.
Abu Salih said, "It is the flame above the fire below the smoke."
Ad-Dahhak said,
شُوَاظٌ مِّن نَّارٍ
(Shuwaz of fire), "A flood of fire."
Allah said;
وَنُحَاسٌ
(and Nuhas) .
Ali bin Abi Talhah reported from Ibn Abbas;
"The smoke of the fire."
Similar was reported from Abu Salih, Sa`id bin Jubayr and Abu Sinan.
Ibn Jarir said that the Arabs used to call the smoke of the fire, Nuhas and Nihas. But he said that the scholars of Qur'anic recitation said that in this Ayah, the word recited is Nuhas.
Mujahid said, "Molten brass poured over their heads."
Qatadah held the same view.
Ad-Dahhak said, "Nuhas is liquid copper."
The Ayah means, `if you, mankind and the Jinns, try to escape on the Day of Resurrection, then the angels, including those among them who guard Hellfire, will bring you back by directing smoke of fire and molten brass on you.'
Allah's statement,
...
فَلَ تَنتَصِرَانِ
فَبِأَيِّ الاَء رَبِّكُمَا تُكَذِّبَانِ