Allegories are mentioned in the Quran in these verses:

[2:26] God does not shy away from citing any kind of allegory, from the tiny mosquito and greater. As for those who believe, they know that it is the truth from their Lord. As for those who disbelieve, they say, “What did God mean by such an allegory?” He misleads many thereby, and guides many thereby. But He never misleads thereby except the wicked,

[13:35] The allegory of Heaven, which is promised for the righteous, is flowing streams, inexhaustible provisions, and cool shade. Such is the destiny for those who observe righteousness, while the destiny for the disbelievers is Hell.

[14:18] The allegory of those who disbelieve in their Lord: their works are like ashes in a violent wind, on a stormy day. They gain nothing from whatever they earn; such is the farthest straying.

[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.

[24:40] Another allegory is that of being in total darkness in the midst of a violent ocean, with waves upon waves, in addition to thick fog. Darkness upon darkness – if he looked at his own hand, he could barely see it. Whomever God deprives of light, will have no light.

[29:41] The allegory of those who accept other masters beside God is that of the spider and her home; the flimsiest of all homes is the home of the spider, if they only knew.

[47:15] The allegory of Paradise that is promised for the righteous is this: it has rivers of unpolluted water, and rivers of fresh milk, and rivers of wine – delicious for the drinkers – and rivers of strained honey. They have all kinds of fruits therein, and forgiveness from their Lord. (Are they better) or those who abide forever in the hellfire, and drink hellish water that tears up their intestines?

[74:31] We appointed angels to be guardians of Hell, and we assigned their number (19) (1) to disturb the disbelievers, (2) to convince the Christians and Jews (that this is a divine scripture), (3) to strengthen the faith of the faithful, (4) to remove all traces of doubt from the hearts of Christians, Jews, as well as the believers, and (5) to expose those who harbor doubt in their hearts, and the disbelievers; they will say, “What did God mean by this allegory?” God thus sends astray whomever He wills, and guides whomever He wills. None knows the soldiers of your Lord except He. This is a reminder for the people.

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