Fuel is mentioned in the Quran in these verses:
[2:23] If you have any doubt regarding what we revealed to our servant, then produce one sura like these, and call upon your own witnesses against God, if you are truthful.
[2:24] If you cannot do this – and you can never do this – then beware of the Hellfire, whose fuel is people and rocks; it awaits the disbelievers.
[3:10] Those who disbelieve will never be helped by their money, nor by their children, against God. They will be fuel for Hell.
[21:98] You and the idols you worship besides God will be fuel for Hell; this is your inevitable destiny.
[24:35] God is the light of the heavens and the earth. The allegory of His light is that of a concave mirror behind a lamp that is placed inside a glass container. The glass container is like a bright, pearl-like star. The fuel thereof is supplied from a blessed oil-producing tree, that is neither eastern, nor western. Its oil is almost self-radiating; needs no fire to ignite it. Light upon light. God guides to His light whoever wills (to be guided). God thus cites the parables for the people. God is fully aware of all things.
[36:80] He is the One who creates for you, from the green trees, fuel which you burn for light.
[66:6] O you who believe, protect yourselves and your families from the Hellfire whose fuel is people and rocks. Guarding it are stern and powerful angels who never disobey God; they do whatever they are commanded to do.
[72:15] As for the compromisers, they will be fuel for Gehenna.
To learn more, read the Quran in English.
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