Iqlab is the third rule of Noon Sakinah and Tanween. When a silent Noon or a Tanween is followed by the letter ب, the Noon is converted into a Meem, and that Meem is then pronounced hidden, with a two-count nasal sound (ghunnah), before the ب — which itself is pronounced in full. Iqlab has only one trigger letter, which makes it the simplest of the four rules of Noon Sakinah and Tanween to recognise.
Also spelled Iqlaab, Ilqab or Eqlab in English transliterations.
⚡ The 30-second version: one trigger letter (ب) · the Noon or Tanween is converted into a Meem · that Meem is then hidden, not announced, with a two-count ghunnah · the ب after it stays and is pronounced fully · in the Madinah Mushaf the sign is a small Meem: over the Noon in place of a sukoon (مِنۢ), or in place of the second Tanween mark (سَمِيعَۢا).
What Does Iqlab Mean?
Iqlab (إقلاب) literally means “to flip”, “to turn something over” or “to convert”. In Tajweed it means converting a silent Noon or Tanween into a Meem before the letter ب, and then pronouncing that Meem hidden, with a nasal sound of two counts.
The word comes from the root q-l-b (قَلَبَ) — to overturn, to flip a thing onto its other side. The name is literal: the Noon is replaced by a different letter. But the conversion is only the first half of the rule. The Meem that results is not announced; it is hidden before the ب with ghunnah. Ibn al-Jazari describes Iqlab in exactly these terms in al-Nashr: the converted Meem ends up hidden before the Baa, with its ghunnah clearly present (quoted in IslamWeb fatwa 52856).
A conversion first — then a concealment
In Izhar the Noon is pronounced clearly. In Idgham it merges into the letter after it. In Ikhfaa it stays a Noon but is hidden. In Iqlab the Noon is first converted into a Meem, and that Meem is then hidden before the ب. Iqlab is the only one of the four rules in which the letter you pronounce changes identity — yet it still ends in concealment, which is why its ghunnah has the same two-count length as Ikhfaa.
So the working definition to carry with you is this: a silent Noon or Tanween before ب is read as a Meem — a Meem you hide rather than announce, held for two counts, followed directly by a full ب. Everything else on this page is detail hanging off that sentence.
The Iqlab Letters — Just One
Learners arrive here expecting a list, because Izhar has six letters and Idgham has six. This rule has one. There is no mnemonic to learn, no grouping to memorise and no exceptions to file away — which makes it the fastest rule in Tajweed to learn properly.
| Letter | Name | Makhraj | With Noon | With Tanween | Audio |
|---|---|---|---|---|---|
| ب | Baa (b) | The two lips — الشفتان | مِنۢ بَعۡدِ | سَمِيعَۢا بَصِيرࣰا |
Why ب specifically, and why a Meem?
This is the part that turns a rule you memorise into a rule you understand, and it comes down to what your mouth can physically do.
The Noon is voiced and nasal: the tongue tip meets the gum line and air escapes through the nose. The Baa is a lip sound with a small explosion in it — the lips close, pressure builds, and the sound releases. The two are too far apart for the Noon to merge into the Baa, yet pronouncing the Noon fully clear right before a Baa is heavy. Ibn al-Jazari gives the classical reason in al-Tamhid: the Meem shares ghunnah and voicing with the Noon and shares its point of articulation with the Baa, so it takes the Noon’s place (quoted in IslamWeb fatwa 52856).
🔑 The Meem is the bridge. It shares the nasal quality of the Noon and the lip position of the Baa. The tongue never has to travel to the Noon position, because the sound is handed from the nose to the lips in a single motion.
Linguists call this kind of change place assimilation: a consonant shifting its point of articulation towards the one that follows it. A similar tendency exists in English — many speakers say “ten bags” with an M-like sound in the middle without being taught to. Tajweed does something different in kind: it fixes the change as a precise rule, with a defined ghunnah length, learned from a teacher. You can see where each of these sounds is formed in our guide to the Makhraj of Arabic letters.
How to Spot Iqlab in the Mushaf
Most learners meet this rule twice: once in a lesson, and once again a week later when they open the Quran, see a Noon with a tiny letter floating above it, and wonder what happened. This section answers that — for the Madinah Mushaf in the narration of Hafs, the edition most readers use today.
1. A missing sukoon is not the sign
In this Mushaf convention the sukoon is written on a Noon Sakinah only when it is pronounced clearly (Izhar), as in مِنۡ عَلَقٍ. When the Noon is not pronounced clearly — in Idgham, Ikhfaa and Iqlab — the sukoon is left off:
مِّن مَّسَدِۭ (Idgham) · مِن تَحۡتِهَا (Ikhfaa)
So a Noon without a sukoon only tells you that the Noon is not read clearly. It does not tell you which rule applies.
2. The small Meem is the sign
In Iqlab, a miniature Meem is written over the Noon where a sukoon would otherwise go: مِنۢ بَعۡدِ. That mark is an instruction: read this Noon as a Meem — and, as the rest of this page explains, a hidden one.
3. With Tanween, the small Meem replaces the second mark
A Tanween is normally written as a doubled vowel mark. Before a ب, only one vowel mark is written and the small Meem takes the place of the second one — above the letter for Fath and Damm, below it for Kasr. The IslamWeb fatwa center states this directly: the small Meem is written instead of the Tanween’s second mark, and not as an extra letter attached to the word.
سَمِيعَۢا بَصِيرࣰا · صُمُّۢ بُكۡمٌ · كِرَامِۭ بَرَرَةࣲ
Staggered (offset) Tanween marks are a different signal in this convention: they appear where the Tanween is merged or hidden — Idgham and Ikhfaa — not in Iqlab.
Symbol spotter: see the difference in ten seconds
Switch between the four specimens below and tap the outlined word in each one. The first is a Noon read clearly; the second is a Noon without a sukoon that is not Iqlab; the third and fourth are Iqlab, with a Noon and with a Tanween.
Tap the outlined word in the specimen above.
The slow-speed setting applies to every audio clip on this page.
One caveat worth knowing: this notation is the convention of the Madinah Mushaf in the narration of Hafs, printed by the King Fahd Glorious Quran Printing Complex and followed by most editions in circulation today. Some regional prints mark it differently, and on screens the exact look of these marks also depends on the font. The rule does not change — only the ink does.
How to Pronounce Iqlab Correctly
Understanding this rule takes about a minute. Producing it correctly takes longer, because the hidden Meem is easy to over-press or to cut short — and both are hard to hear in your own mouth until someone points them out.
⚠️ The Meem here is a hidden Meem
It is a Meem Mukhfaah: its ghunnah runs through the nose for two counts, and the lips are never pressed or tightened.
Qualified teachers today teach two ways of placing the lips. The approach demonstrated in this lesson leaves a very slight gap between the lips. Other qualified teachers teach a light, gentle closure, with no pressure. The IslamWeb fatwa center describes this as a point of disagreement among later reciters and quotes scholars on both sides. Whichever way you were taught, follow your own qualified teacher consistently.
1. Do not pronounce the Noon at all
The tongue tip does not go to the gum line. There is no trace of an N before the Meem — the letter was replaced, not decorated.
2. Relax the lips and hold the ghunnah for two counts
In this lesson’s approach the lips come together leaving a very slight gap; in the gentle-closure approach they meet lightly. In both, they are relaxed — not pressed, and not pulled apart — while the sound resonates in the nose for two counts. Two counts is the same length used in Ikhfaa and in Idgham with ghunnah — roughly two relaxed finger taps.
3. Move straight into the Baa — no pause
The lips are already near their position, so the Baa needs no travel. It is then pronounced in full, with the firm lip closure and release that the Baa itself requires.
① The Noon is converted
- Tongue
- Stays down — no Noon is formed.
- Result
- The sound you produce is a Meem.
② The Meem is hidden · 2 counts
- Ghunnah
- Resonates in the nasal passage (الخيشوم) — not at the lips.
- Lips
- Relaxed: a very slight gap (this lesson) or a light touch (other teachers). Never pressed.
③ The Baa follows
- Lips
- Close firmly and release.
- Result
- The ب is pronounced in full — it never disappears or turns into a Meem.
There is a shortcut here that most pages never mention. This sound is not new to you if you already know Ikhfaa Shafawi — the hiding of a silent Meem before a ب. Ibn al-Jazari notes in al-Nashr that once the Noon has become a Meem, there is no difference in pronunciation between أَنۢ بُورِكَ and يَعۡتَصِم بِٱللَّهِ (quoted in fatwa 52856). Same lips, same ghunnah, same two counts. Learn one and you have learned both — compare the two clips below.
مِنۢ بَعۡدِ مِيثَٰقِهِۦ
Iqlab — a silent Noon converted to a hidden Meem (Al-Baqarah 2:27)
تَرۡمِيهِم بِحِجَارَةࣲ مِّن سِجِّيلࣲ
Ikhfaa Shafawi — a silent Meem hidden before the same ب (Al-Fil 105:4, whole ayah)
💡 The listen-and-compare exercise
Play the two Al-Husary clips above one after the other, then say مِنۢ بَعۡدِ and تَرۡمِيهِم بِحِجَارَةࣲ yourself and compare. Listen for three things: no trace of an N; a ghunnah that lasts the same two counts in both clips; and a Baa that follows without a break. Use the slow-speed button if it helps.
Recordings teach length and continuity, but they cannot show you the lips — that part comes from your teacher. English phrases such as “some bread” are sometimes offered as a shortcut, but they do not reliably teach either the lip position your teacher uses or the two-count ghunnah: the English M is short and unmeasured.
Iqlab Rules: When It Applies
The trigger has no conditions attached to it: a silent Noon or a Tanween, followed by ب. That combination shows up in three shapes.
1. Inside a single word
The silent Noon and the ب sit in the same word.
أَنۢبِئۡهُم · لَيُنۢبَذَنَّ
2. Across two words
The word ends on a silent Noon and the next word opens with ب.
مِنۢ بَعۡدِ · أَنۢ بُورِكَ
3. Tanween + ب
All three Tanween endings behave exactly like a silent Noon, because phonetically that is what a Tanween is.
سَمِيعُۢ بَصِيرٌ · صُمُّۢ بُكۡمٌ
⚠️ A difference worth filing away: this rule works in all three positions without conditions. Idgham does not — it never applies inside a single word, which is why الدُّنۡيَا is read clearly instead of merged. Here, أَنۢبِئۡهُم converts just as readily as مِنۢ بَعۡدِ.
Iqlab vs the Other Noon Sakinah Rules
Four rules, one silent Noon, and the only thing that decides between them is the letter that comes next.
| Rule | Letters | What happens to the Noon | Ghunnah | Example |
|---|---|---|---|---|
| Izhar | 6 throat letters | Pronounced clearly | Natural nasal quality; no added prolongation | مِنۡ عِلۡمٍ |
| Idgham | 6 (Yarmaloon) | Merges into the next letter | 2 counts with ي ن م و; none with ل ر | فَمَن يَعۡمَلۡ |
| Iqlab ← this page | ب only | Converted into a Meem, which is then hidden | 2 counts | مِنۢ بَعۡدِ |
| Ikhfaa | The remaining 15 | Stays a Noon, hidden | 2 counts | مِّن كُلِّ |
If you keep one sentence from this page, keep this one: Izhar reveals the Noon, Idgham merges it, Ikhfaa hides it — and Iqlab converts it into a Meem and then hides that Meem. All four rules decide how the Noon is heard. Only Iqlab also changes which letter you hear.
Interactive Practice: Find the Iqlab
Iqlab has one letter — but can you spot it inside a verse, with the other three rules competing for your attention? Ten questions, instant feedback, no sign-up.
Choose the rule that applies to the highlighted letters.
Iqlab Examples from the Quran
Six short examples covering both word positions, all three Tanween endings, and one related case. The Noon or Tanween is marked in blue, the ب in orange. The audio is the continuous recitation of Sheikh Mahmoud Khalil Al-Husary at normal pace — two clips are trimmed from longer ayat, the others play the whole short ayah.
مِنۢ بَعۡدِ مِيثَٰقِهِۦ
Al-Baqarah 2:27 · Noon Sakinah + ب across two words
كَلَّاۖ لَيُنۢبَذَنَّ فِي ٱلۡحُطَمَةِ
Al-Humazah 104:4 · Noon Sakinah + ب inside one word
سَمِيعَۢا بَصِيرࣰا
An-Nisa 4:58 · Tanween Fath + ب — one Fatha, with the small Meem in place of the second mark
كَلَّا لَئِن لَّمۡ يَنتَهِ لَنَسۡفَعَۢا بِٱلنَّاصِيَةِ
Al-‘Alaq 96:15 · Noon al-Tawkid al-Khafifah + ب. This ending is not true Tanween: it is the light emphatic Noon on a verb, written in the form of a Fath Tanween. It is a silent Noon before ب, so Iqlab applies (grammar source).
صُمُّۢ بُكۡمٌ عُمۡيࣱ فَهُمۡ لَا يَرۡجِعُونَ
Al-Baqarah 2:18 · Tanween Damm + ب
كِرَامِۭ بَرَرَةࣲ
‘Abasa 80:16 · Tanween Kasr + ب — one Kasra, with the small Meem written below
Two more worth knowing by heart, because they close dozens of ayat between them: سَمِيعُۢ بَصِيرٌ and عَلِيمُۢ بِذَاتِ ٱلصُّدُورِ. And inside a single word, the clearest example of all is أَنۢبِئۡهُم — get this rule right once and it pays out across the whole Quran.
Common Mistakes to Avoid
1. Pressing the lips together
Whether your teacher uses a very slight gap or a light closure, the lips should never be pressed or tightened. Forceful pressure tends to make the Meem sound abrupt and announced rather than hidden, and it often comes with a ghunnah that is cut short. Keep the lips relaxed and let the sound run through the nose for its full two counts.
2. Opening the lips too far
The opposite error. A visible gap, or air pushed out through the mouth, weakens the Meem and can make it sound like a Noon or a vowel. Any gap taught in this approach is very slight.
3. Sounding the Noon before the Meem
Producing a faint “n” and then the Meem. The Noon is not present in any form — it was converted, and the tongue tip has no work to do at all.
4. Cutting the nasal sound short
Two counts, the same measure as Ikhfaa. Rushing it produces something close to clear pronunciation, and dropping it entirely removes the rule altogether.
5. Stopping between the Meem and the ب
There is no gap and no catch of breath. The two sounds are continuous — the hidden Meem flows directly into a full Baa.
6. Forgetting that Tanween counts
Readers watch for a written Noon and recite straight past سَمِيعُۢ بَصِيرٌ. A Tanween is a silent Noon that is not written as a letter — the rule applies identically, and the small Meem in place of the second Tanween mark is there to remind you.
Play: Catch the Iqlab Letter (Free Game)
Recognition under time pressure is a different skill from recognition on a page. Catch the letter that triggers the rule, dodge the rest, and see how long you last. It works on phones and tablets, and no account is needed.
Game not loading? Open it in a new tab · or browse all our free Arabic letter games.
Learn More
Iqlab is one of four rules that govern the silent Noon. Here’s what to study next:
All of them sit inside the wider set of Tajweed rules, and all of them are covered step by step in our Tajweed courses.
Frequently Asked Questions
May Allah beautify your recitation and accept it from you. 🤲
Hafidha of the Quran · Arabic Language Graduate · Writer on Islamic Sciences
Jehad Mahmoud is a graduate of the Arabic Language department and a Hafidha of the Quran who writes the Islamic educational content at Quran Book Academy.
She writes with a focus on Tajweed, Quranic recitation and the sharia sciences, making technical rules accessible to English-speaking Muslim families.
Her articles are educational, not fatwa. For a ruling on a specific personal situation, readers are advised to consult a qualified scholar or mufti.
References & Sources
1. IslamWeb Fatwa Center, fatwa 52856 — on the slight gap versus closure of the lips in Iqlab and Ikhfaa Shafawi; quotes Ibn al-Jazari (al-Tamhid, al-Nashr), al-Dani, al-Mar’ashi and contemporary reciters — islamweb.net/ar/fatwa/52856 (Arabic)
2. IslamWeb Fatwa Center, fatwa 253837 — the small Meem is written in place of the Tanween’s second mark — islamweb.net/ar/fatwa/253837 (Arabic)
3. IslamWeb Fatwa Center, fatwa 286711 — I’rab of Surah Al-‘Alaq, quoting I’rab al-Qur’an by al-Da”as and others; identifies the Noon al-Tawkid al-Khafifah in لَنَسۡفَعًا — islamweb.net/ar/fatwa/286711 (Arabic)
4. King Fahd Glorious Quran Printing Complex — Madinah Mushaf notation; Quranic text on this page follows the Complex’s Uthmani Hafs script — qurancomplex.gov.sa
5. Encyclopedia of Arabic Language and Linguistics — Brill Reference Works
6. Al-Azhar Al-Sharif — azhar.eg
7. Surah Al-‘Alaq 96 — Quran.com
8. Recitation — Sheikh Mahmoud Khalil Al-Husary, via EveryAyah.com
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