The verified pattern: 9 of the 11 occurrences of the name Iblīs sit inside the prostration scene, and in none of them is the name the subject of a verb of whispering, causing to slip, promising or adorning. The word shayṭān carries exactly those verbs, and also works as a class word. In three surahs (Q 2, 7, 20) the name changes inside one telling; in Q 17 it changes between 17:61 and 17:64 inside a single address.
Textual datum
Two names, two counts
وَاِذْ قُلْنَا لِلْمَلٰٓئِكَةِ اسْجُدُوا لِاٰدَمَ فَسَجَدُوا اِلَّا اِبْلِيسَ اَبٰى وَاسْتَكْبَرَ وَكَانَ مِنَ الْكَافِرِينَ
And [mention] when We said to the angels, "Prostrate before Adam"; so they prostrated, except for Iblees. He refused and was arrogant and became of the disbelievers
Q 2:34
The name Iblis occurs 11 times in the Qur'an. The word shayṭān occurs 88 times: 70 singular (64 with the definite article, 6 indefinite) and 18 plural (shayāṭīn, devils). Nine of the 11 occurrences of Iblis sit inside the prostration scene. Shayṭān, by contrast, is spread across almost the whole Qur'an: Adam's trial in the Garden, Job's affliction, the man Moses killed, intoxicants and gambling, usury, charity, the battle of Badr.
Textual datum
Illā Iblīs: the same frame in seven tellings
وَاِذْ قُلْنَا لِلْمَلٰٓئِكَةِ اسْجُدُوا لِاٰدَمَ فَسَجَدُوا اِلَّا اِبْلِيسَ اَبٰى
And [mention] when We said to the angels, "Prostrate to Adam," and they prostrated, except Iblees; he refused
Q 20:116
The command to prostrate is told in seven surahs, and in all seven the shared element is the same exceptive particle: illā Iblīs, "except Iblis". Q 2:34, 7:11, 15:31, 17:61, 18:50, 20:116, 38:74. In five of them the exception continues the prostration clause directly; at Q 15:30-31 and Q 38:73-74 the prostration clause closes its own verse and the exception opens the next. Here the name marks the one who steps out of the ranks.
Textual datum
Yā Iblīs: direct address in only two places
قَالَ يَا اِبْلِيسُ مَا لَكَ اَلَّا تَكُونَ مَعَ السَّاجِدِينَ
[Allah] said, O Iblees, what is [the matter] with you that you are not with those who prostrate
Q 15:32
God addresses him by name in two places: Q 15:32 and Q 38:75. Both sit inside the prostration scene and both are questions. The Qur'an has the vocative "yā Iblīs"; the vocative "yā shayṭān" never occurs in it.
Textual datum
Q 18:50: the one statement that he was of the jinn
وَاِذْ قُلْنَا لِلْمَلٰٓئِكَةِ اسْجُدُوا لِاٰدَمَ فَسَجَدُوا اِلَّا اِبْلِيسَ كَانَ مِنَ الْجِنِّ فَفَسَقَ عَنْ اَمْرِ رَبِّهِ اَفَتَتَّخِذُونَهُ وَذُرِّيَّتَهُ اَوْلِيَاءَ مِنْ دُونِي وَهُمْ لَكُمْ عَدُوٌّ بِئْسَ لِلظَّالِمِينَ بَدَلاً
And [mention] when We said to the angels, "Prostrate to Adam," and they prostrated, except for Iblees. He was of the jinn and departed from the command of his Lord. Then will you take him and his descendants as allies other than Me while they are enemies to you? Wretched it is for the wrongdoers as an exchange
Q 18:50
Among the seven tellings, what he was is stated only once: kāna mina'l-jinn, "he was of the jinn" (Q 18:50). The same verse asks whether he and his offspring are to be taken as allies and says "they are enemies to you", moving from a singular name to a plural enmity. The word shayāṭīn does not occur in this verse.
Textual datum
The one who whispers, makes slip and promises: always Shayṭān
فَوَسْوَسَ لَهُمَا الشَّيْطَانُ لِيُبْدِيَ لَهُمَا مَا وُرِيَ عَنْهُمَا مِنْ سَوْاٰتِهِمَا وَقَالَ مَا نَهٰيكُمَا رَبُّكُمَا عَنْ هٰذِهِ الشَّجَرَةِ اِلَّا اَنْ تَكُونَا مَلَكَيْنِ اَوْ تَكُونَا مِنَ الْخَالِدِينَ
But Satan whispered to them to make apparent to them that which was concealed from them of their private parts. He said, "Your Lord did not forbid you this tree except that you become angels or become of the immortal
Q 7:20
The verbs of whispering (waswasa), causing to slip (azalla), deceptive promising (yaʿidu), adorning (zayyana) and touching (massa) never take the name Iblis as their subject in the Qur'an. None of the 11 Iblis verses contains any of them. Iblis does vow to lead astray inside the prostration scene (Q 7:16-17, 15:39, 17:62, 38:82), but when the deed itself is narrated the name used is Shayṭān.
Textual datum
The name changes inside one telling
فَاَزَلَّهُمَا الشَّيْطَانُ عَنْهَا فَاَخْرَجَهُمَا مِمَّا كَانَا فِيهِ وَقُلْنَا اهْبِطُوا بَعْضُكُمْ لِبَعْضٍ عَدُوٌّ وَلَكُمْ فِي الْاَرْضِ مُسْتَقَرٌّ وَمَتَاعٌ اِلٰى حِينٍ
But Satan caused them to slip out of it and removed them from that [condition] in which they had been. And We said, "Go down, [all of you], as enemies to one another, and you will have upon the earth a place of settlement and provision for a time
Q 2:36
In three surahs both names appear inside one continuous telling, and the order is always the same. In al-Baqara the one who refuses is Iblis (Q 2:34); two verses later the one who makes them slip is Shayṭān (Q 2:36). In al-Aʿrāf, Q 7:11 Iblis, Q 7:20 Shayṭān. In Ṭā Hā, Q 20:116 Iblis, Q 20:120 Shayṭān. The refusal carries one name, the deed the other.
Textual datum
Q 17: two names inside one dialogue
وَاسْتَفْزِزْ مَنِ اسْتَطَعْتَ مِنْهُمْ بِصَوْتِكَ وَاَجْلِبْ عَلَيْهِمْ بِخَيْلِكَ وَرَجِلِكَ وَشَارِكْهُمْ فِي الْاَمْوَالِ وَالْاَوْلَادِ وَعِدْهُمْ وَمَا يَعِدُهُمُ الشَّيْطَانُ اِلَّا غُرُوراً
And incite [to senselessness] whoever you can among them with your voice and assault them with your horses and foot soldiers and become a partner in their wealth and their children and promise them." But Satan does not promise them except delusion
Q 17:64
The tightest switch is in al-Isrāʾ. The name occurs in the narrative frame: at Q 17:61 the one who does not prostrate is Iblis, and his own words follow. The divine reply begins at Q 17:63 and continues in the second person at Q 17:64 (go, incite, share, promise). That same verse closes by turning to the third person: "But Shayṭān promises them nothing except delusion". So the name Iblīs does not occur inside the address; the name used in the third-person clause is Shayṭān. Reading the addressee and this Shayṭān as one and the same is the reading of the classical commentators; what the text itself shows is the change of name.
Textual datum
Which name is used when Adam is warned
فَدَلّٰيهُمَا بِغُرُورٍ فَلَمَّا ذَاقَا الشَّجَرَةَ بَدَتْ لَهُمَا سَوْاٰتُهُمَا وَطَفِقَا يَخْصِفَانِ عَلَيْهِمَا مِنْ وَرَقِ الْجَنَّةِ وَنَادٰيهُمَا رَبُّهُمَا اَلَمْ اَنْهَكُمَا عَنْ تِلْكُمَا الشَّجَرَةِ وَاَقُلْ لَكُمَا اِنَّ الشَّيْطَانَ لَكُمَا عَدُوٌّ مُبِينٌ
So he made them fall, through deception. And when they tasted of the tree, their private parts became apparent to them, and they began to fasten together over themselves from the leaves of Paradise. And their Lord called to them, "Did I not forbid you from that tree and tell you that Satan is to you a clear enemy
Q 7:22
When God tells Adam who his enemy is, the name Iblis is not used. At Q 7:22 the wording is "Indeed Shayṭān is to you a clear enemy". At Q 20:117 a demonstrative stands in place of any name: "this is an enemy to you and to your wife". The name belongs to the prostration scene; the warning addressed to the human being carries the functional word or a pronoun.
Textual datum
Q 34:20: where the pattern breaks
وَلَقَدْ صَدَّقَ عَلَيْهِمْ اِبْلِيسُ ظَنَّهُ فَاتَّبَعُوهُ اِلَّا فَرِيقاً مِنَ الْمُؤْمِنِينَ
And Iblees had already confirmed through them his assumption, so they followed him, except for a party of believers
Q 34:20
The name Iblis leaves the prostration scene in two places; the first is Q 34:20. The verse reports that his expectation about people proved true and that they followed him, all but a party of believers. Whom the pronoun "them" refers to is discussed differently by the commentators. In the verse Iblīs is the subject of the verb ṣaddaqa; no verb of whispering, causing to slip or deceptive promising appears here. Neither the singular nor the plural shayṭān occurs anywhere in Sūrat Sabaʾ.
Interpretation
The exception changes sides
وَلَقَدْ صَدَّقَ عَلَيْهِمْ اِبْلِيسُ ظَنَّهُ فَاتَّبَعُوهُ اِلَّا فَرِيقاً مِنَ الْمُؤْمِنِينَ
And Iblees had already confirmed through them his assumption, so they followed him, except for a party of believers
Q 34:20
As a reading: the exceptive particle illā occurs in eight of the verses naming Iblis. In seven of them the one excepted is Iblis himself, standing apart from those who prostrate. At Q 34:20 the same particle excepts a party of believers instead, standing apart from those who follow him. The contrast is our own framing; what the verses state is simply the two exceptions side by side.
Textual datum
Q 26:95: the hosts, and the inflection of Iblīs
وَجُنُودُ اِبْلِيسَ اَجْمَعُونَ
And the soldiers of Iblees, all together
Q 26:95
The second break in the pattern is Q 26:95. The verse lists those cast into the Fire and says junūdu Iblīs, "the hosts of Iblis"; it has no connection to the prostration scene. The same verse also carries a grammatical datum: here Iblīs is the second term of a construct (muḍāf ilayh) and therefore in the genitive, yet it is read with fatḥa rather than kasra. The word is diptote (ghayr munṣarif). Its four positions run as follows: manṣūb by the exceptive in the seven prostration verses, a vocative built on ḍamma at Q 15:32 and Q 38:75, marfūʿ as subject at Q 34:20, and majrūr as muḍāf ilayh yet with fatḥa at Q 26:95. In none of them does it take tanwīn.
Classical exegesis
Al-Ṭabarī: does Iblīs come from iblās
وَيَوْمَ تَقُومُ السَّاعَةُ يُبْلِسُ الْمُجْرِمُونَ
And the Day the Hour appears the criminals will be in despair
Q 30:12
In his commentary on Q 2:34 al-Ṭabarī treats the name under a separate heading ("On the meaning of Iblīs") and says: Iblīs is of the pattern ifʿīl from iblās, and iblās means despair of good, regret and grief. The same root appears as a verb in the Qur'an: yublisu al-mujrimūn (Q 30:12). Al-Rāghib al-Iṣfahānī gives the same derivation, but transmits it with the qualifier "so it is said". The Qur'anic language corpus, for its part, tags the word as a proper noun with no root assigned.
Classical exegesis
Al-Ṭabarī: if it is Arabic, why no tanwīn
وَجُنُودُ اِبْلِيسَ اَجْمَعُونَ
And the soldiers of Iblees, all together
Q 26:95
Al-Ṭabarī raises the objection himself: if Iblīs is ifʿīl from iblās, why is it not declined with tanwīn? His answer: because it is a name with no parallel among Arabic names, its declension was found burdensome and dropped, and the Arabs likened it to the foreign names they do not decline; the names Isḥāq and Ayyūb stand in the same position. So the name is counted Arabic in derivation while being inflected like a foreign one. The fatḥa in the genitive at Q 26:95 is where this shows up in the text itself.
Classical exegesis
Shayṭān: to be distant, or to burn
وَخَلَقَ الْجَانَّ مِنْ مَارِجٍ مِنْ نَارٍ
And He created the jinn from a smokeless flame of fire
Q 55:15
Ibn Manẓūr sets the two views side by side. First: shayṭān is fayʿāl from shaṭana, to be distant; the nūn is radical, and the plural shayāṭīn is the proof of it. Second: it is faʿlān from shāṭa yashīṭu, to perish or burn; the nūn is then an augment. Al-Azharī holds the first to be the more prevalent. Al-Rāghib al-Iṣfahānī reports both and links the second to the creation of the jinn from fire (Q 55:15).
Classical exegesis
Shayṭān is a class word
وَكَذٰلِكَ جَعَلْنَا لِكُلِّ نَبِيٍّ عَدُواًّ شَيَاطِينَ الْاِنْسِ وَالْجِنِّ يُوحِي بَعْضُهُمْ اِلٰى بَعْضٍ زُخْرُفَ الْقَوْلِ غُرُوراً وَلَوْ شَاءَ رَبُّكَ مَا فَعَلُوهُ فَذَرْهُمْ وَمَا يَفْتَرُونَ
And thus We have made for every prophet an enemy - devils from mankind and jinn, inspiring to one another decorative speech in delusion. But if your Lord had willed, they would not have done it, so leave them and that which they invent
Q 6:112
Ibn Manẓūr's entry is explicit: every insolent rebel among jinn, human beings and beasts is a shayṭān. Al-Rāghib attributes the same definition to Abū ʿUbayda. The Qur'an shows this in the shape of the word itself: Q 6:112 speaks of "the devils of mankind and jinn", Q 2:14 uses a possessive suffix, "their devils", and in six places the word is indefinite, "a devil" (Q 4:117, 15:17, 22:3, 37:7, 43:36, 81:25). The name Iblīs does none of this: it takes no article, no plural, no indefinite form and no possessive suffix.
Textual datum
The indefinite form: a devil
وَحَفِظْنَاهَا مِنْ كُلِّ شَيْطَانٍ رَجِيمٍ
And We have protected it from every devil expelled [from the mercy of Allah]
Q 15:17
Q 15:17 states that the heaven is guarded "from every devil expelled": the word is indefinite here and paired with "every", pointing to a countable class. Of the 70 singular occurrences of shayṭān, 64 carry the definite article and 6 are indefinite in this way. The name Iblīs never shows this flexibility; all 11 occurrences are the bare proper name.
Classical exegesis
Why the name changes, in classical exegesis
قَالَ فَاخْرُجْ مِنْهَا فَاِنَّكَ رَجِيمٌ
[Allah] said, "Then get out of Paradise, for indeed, you are expelled
Q 38:77
In his commentary on Q 2:34 al-Ṭabarī transmits a report from Ibn ʿAbbās: God made him despair of all good and, as the punishment of his disobedience, made him an expelled devil. Another report, from al-Suddī, says his name was al-Ḥārith and that he was called Iblīs only when he despaired. These are reports al-Ṭabarī relays with their chains, not statements of the verse. On Q 2:35 al-Ṭabarī also holds that the "Shayṭān" who makes them slip in Q 2:36 is the same being, now after the curse and after his arrogance had become manifest. The word said to him at Q 38:77, "you are expelled" (rajīm), is the same word the Qur'an later attaches so often to shayṭān.