Translation of the verse 15 from Surah Al-Jinn : Number of verses 28 - - page 573 - Part 29.
And as for the Qasitun (disbelievers who deviated from the Right Path), they shall be firewood for Hell,
But as for the unjust, they will be, for Hell, firewood.'
(72:15) but those who deviated from the Truth, will be the fuel for Hell.' *14
*14) Here, one may ask: when, according to the Qur'an, the jinn have been created from the fire, what harm can the fire of Hell do them? The answer is: Even according to the Qur'an, man has been created out of the earth; why does then man feel hurt when a clod of earth is thrown at him? The truth is that although the whole body of man has been made from the earthly substances, when a living man of flesh and blood is moulded from them he becomes an entirely different thing from those substances; then other things made from the same substances become a means of causing harm to him. Likewise, although the jinn also have been created from the fire, when a living and sentient creation has been made from it, the same fire becomes a means of causing harm and hurt for it. (For further explanation, see E.N. 15 of Surah Ar-Rahman).
Source : Al-Jinn Verse 15: But as for the unjust, they will be, for Hell, firewood.'