The iqlab rule says that when a noon sakinah (نْ) or a tanween is followed by the letter ba (ب), you do not pronounce the noon. Instead you change it into a meem, hide that meem with a light closing of the lips, and hold a nasal sound (ghunnah) for two counts before saying the ba. Iqlab has just one letter, which makes it the easiest of the four noon sakinah rules to recognize, but its pronunciation is where many students slip. Every student in our Tajweed rules course practices it early, because it appears constantly in phrases like مِنۢ بَعْدِ and سَمِيعٌۢ بَصِيرٌ.
This guide covers what happens in your mouth during iqlab, how to spot it in the mushaf, clear Quran examples, and the mistakes teachers correct most often, all according to the recitation of Hafs ‘an ‘Asim.
Key takeaways
- Iqlab happens when noon sakinah or tanween is followed by ب, inside one word or across two words.
- Three actions happen together: change the noon to meem, hide the meem, and hold a 2-count ghunnah.
- In the Madani mushaf, iqlab is marked by a small meem (ۢ) above the noon or in place of one tanween mark.
- The most common mistakes are saying a clear noon, or pressing the lips hard so the ghunnah disappears.
What Iqlab Means
Iqlab (إقلاب) literally means turning something over or converting it from one form into another. In tajweed, it means converting the noon sound into a meem sound when ba follows.
It is the third of the four rules of noon sakinah and tanween. In the classic poem Tuhfat al-Atfal, Imam Sulayman al-Jamzuri summarizes it in one line:
وَالثَّالِثُ الإِقْلَابُ عِنْدَ الْبَاءِ ، مِيمًا بِغُنَّةٍ مَعَ الإِخْفَاءِ
“The third is iqlab, before the ba: [turning the noon into] a meem, with ghunnah and with ikhfa.” That single line contains the whole rule.
Why the Noon Changes Into a Meem
The reason is about articulation points. Noon is made with the tip of the tongue against the gum ridge, while ba is made by closing both lips. Moving from one to the other is awkward:
- Izhar (a clear noon followed by ba) feels heavy and unnatural.
- Idgham (merging noon into ba) is impossible because the two letters share neither articulation point nor key qualities.
- Meem is the perfect bridge. It is made with the lips, exactly like ba, and it carries a ghunnah, exactly like noon.
So the noon is replaced by a meem, which keeps the noon’s nasal sound while preparing the lips for the ba.
How to Pronounce Iqlab Step by Step
- Drop the noon completely. The tip of your tongue should not touch the gum ridge at all.
- Bring your lips together lightly as if to say a meem. Do not press them tightly.
- Hold the ghunnah from the nose for about two counts. The sound flows through the nasal passage while your lips are closed or nearly closed.
- Release into the ba with its own vowel, clearly and without a pause.
The ghunnah in iqlab is always light (tarqeeq), because it belongs to the meem and the following ba is a light letter.
Closed lips or a slight gap?
Most teachers in the Hafs tradition teach that the lips close gently, without pressure, during the ghunnah. Some qualified teachers instead teach leaving a very slight gap between the lips. Both are taught today, so follow the method of your own teacher consistently rather than switching between them. What every teacher agrees on is that the lips must not be pressed hard, since that turns the hidden meem into a clear one.
How to Spot Iqlab in the Mushaf
In the Madani mushaf used by most students, iqlab is marked so you never have to guess:
| Situation | How it is written | Example |
|---|---|---|
| Noon sakinah | No sukun on the noon; a small meem above it | مِنۢ بَعْدِ |
| Dammatayn | One damma plus a small meem | سَمِيعٌۢ بَصِيرٌ |
| Fathatayn | One fatha plus a small meem | لَنَسْفَعًۢا بِٱلنَّاصِيَةِ |
| Kasratayn | One kasra plus a small meem below | كِرَامٍۭ بَرَرَةٍ |
Other printings may mark it differently or not at all, so learn to recognize the rule from the letters, not just the sign. If you want to check any letter as you read, tap it in the finder below and it will show you which noon sakinah rule applies.
Noon and Meem Sakinah Rule Finder
Tap the letter after noon sakinah or tanween to see its rule
Quran Examples of Iqlab
Inside one word
Iqlab inside a single word can only happen with noon sakinah, never with tanween:
- أَنۢبِئْهُم (“anbi’hum”), Surah Al-Baqarah 2:33, pronounced “ambi’hum” with a hidden meem.
- أَنۢبَتَتْ (“anbatat”), Surah Al-Baqarah 2:261.
- يَنۢبُوعًا (“yanbu’a”), Surah Al-Isra 17:90.
- لَيُنۢبَذَنَّ (“layunbadhanna”), Surah Al-Humazah 104:4.
Across two words with noon sakinah
- مِنۢ بَعْدِ (“min ba’di”), for example Surah Al-Baqarah 2:27.
- أَنۢ بُورِكَ (“an burika”), Surah An-Naml 27:8.
Across two words with tanween
- سَمِيعٌۢ بَصِيرٌ (“sami’un basir”), Surah Al-Hajj 22:61.
- عَلِيمٌۢ بِذَاتِ ٱلصُّدُورِ (“‘alimun bi-dhati as-sudur”), Surah Aal ‘Imran 3:119.
- كِرَامٍۭ بَرَرَةٍ (“kiramin bararah”), Surah Abasa 80:16.
- لَنَسْفَعًۢا بِٱلنَّاصِيَةِ (“lanasfa’an bin-nasiyah”), Surah Al-Alaq 96:15.
In every case, your tongue never makes the noon; you hear “mmm” with a nasal hum, then the ba.
Iqlab only applies when you join the two words. If you stop on the word before the ba, for example stopping on سَمِيعٌ, there is no iqlab: you simply stop with a sukun (“sami'”). The rule is about the connection between the noon sound and the ba.
Iqlab vs Ikhfa Shafawi
Once the noon has turned into a meem, iqlab sounds exactly like ikhfa shafawi, the rule for a meem sakinah followed by ba. Compare:
| Iqlab | Ikhfa shafawi | |
|---|---|---|
| Original letter | Noon sakinah or tanween | Meem sakinah |
| Followed by | ب | ب |
| Sound | Hidden meem with 2-count ghunnah | Hidden meem with 2-count ghunnah |
| Example | مِنۢ بَعْدِ | تَرْمِيهِم بِحِجَارَةٍ (Al-Fil 105:4) |
The pronunciation is the same; only the starting letter differs. That is why teachers often drill the two together.
Iqlab Among the Other Noon Sakinah Rules
Iqlab is one of four outcomes for noon sakinah and tanween, depending on the next letter:
- Izhar: the six throat letters, noon pronounced clearly. See our guide to the izhar halqi letters.
- Idgham: the six letters of يرملون, noon merged into the next letter. Our article on idgham letters in tajweed covers them in detail.
- Iqlab: ب only, noon changed into a hidden meem.
- Ikhfa: the remaining fifteen letters, noon hidden with ghunnah. See the 15 ikhfa letters with examples.
Common Iqlab Mistakes
- Saying a clear noon. Reading “min ba’di” with the tongue touching the gum ridge. Fix: keep the tongue relaxed and down, and start the sound from the lips.
- Pressing the lips hard. This produces a strong, clear meem and cuts the ghunnah short. Fix: close the lips as gently as you would to hum.
- Shortening the ghunnah. Rushing straight into the ba. Fix: count two steady beats, the same length as your ikhfa ghunnah.
- Over-lengthening the ghunnah. Holding it for four counts or more. Fix: keep it equal to a natural madd.
- Missing iqlab with tanween. Students spot مِنۢ بَعْدِ but miss it at the end of a word like سَمِيعٌۢ بَصِيرٌ. Fix: whenever you see tanween, check the first letter of the next word.
These are small details that are hard to hear in your own voice. Regular practice with a teacher who listens live is the fastest way to master Tajweed with a teacher and make iqlab automatic.
Frequently Asked Questions
What is the iqlab rule in tajweed?
Iqlab is the rule that applies when a noon sakinah or tanween is followed by the letter ba. The noon is converted into a meem, which is hidden with a light closing of the lips and pronounced with a ghunnah of two counts before the ba.
How many letters does iqlab have?
Iqlab has only one letter: ba (ب). That makes it the easiest noon sakinah rule to identify, although the pronunciation still needs practice.
Do the lips close completely in iqlab?
Most teachers teach closing the lips gently without pressing, while some teach a very slight gap. Both methods are taught by qualified teachers today. The important point is not to press the lips, so the meem stays hidden and the ghunnah flows.
What is the difference between iqlab and ikhfa shafawi?
They sound the same, but iqlab starts from a noon sakinah or tanween, while ikhfa shafawi starts from a meem sakinah. In both cases the next letter is ba and you hold a two-count ghunnah with a hidden meem.
How long is the ghunnah in iqlab?
The ghunnah in iqlab is two counts, the same length as in ikhfa and idgham with ghunnah. A teacher in our online Tajweed classes can help you feel the exact length through live listening and correction.
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