But as for the unjust, they will be, for Hell, firewood.' (72:15)

Almuntakhab Fi Tafsir Alquran Alkarim

Those who swerve from the path of righteousness have been destined to be the fuel for Hell

Tafseer Tafheem-ul-Quran by Syed Abu-al-A'la Maududi

(72:15) but those who deviated from the Truth, will be the fuel for Hell.' *14

But as for the unjust, they will be, for Hell, firewood.' meaning

*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).
 

But as for the unjust, they will be, for Hell, firewood.' meaning in Urdu

اور جو حق سے منحرف ہیں وہ جہنم کا ایندھن بننے والے ہیں"