Quick answer: In the Quran the definite article “al-” (الْ) behaves in two ways. Before the 14 moon letters (Laam Qamariyyah) the laam is pronounced clearly — as in al-qamar (الْقَمَر). Before the 14 sun letters (Laam Shamsiyyah) the laam is silent and merges into the next letter, which is doubled — as in ash-shams (الشَّمْس).
What Are Sun and Moon Letters?
Almost every page of the Quran contains the Arabic word for “the” — the definite article “al-” (الْ), written as an alif and a laam attached to the front of a word. What surprises many beginners is that this laam is not always pronounced. Sometimes you say it clearly, and sometimes it disappears completely into the next letter.
The rule that decides which happens is the rule of sun letters (huroof shamsiyyah) and moon letters (huroof qamariyyah). Every letter of the Arabic alphabet belongs to one of these two groups, and the group of the letter that comes right after “al-” tells you whether the laam is spoken or silent. It is one of the earliest reading rules taught in Noorani Qaida and a foundation for smooth, correct recitation.
Why the Names “Sun” and “Moon”?
The names come from the two example words that teachers have used for centuries. The Arabic word for the sun is ash-shams (الشَّمْس): here the laam is silent and the “sh” sound is doubled. The Arabic word for the moon is al-qamar (الْقَمَر): here the laam is pronounced clearly. So any letter that behaves like the one in “sun” is a sun letter, and any letter that behaves like the one in “moon” is a moon letter. The words themselves are the memory hook.
Laam Qamariyyah: The Moon Laam (Pronounced)
When “al-” is followed by a moon letter, the laam is pronounced with a clear sukoon, and then you read the next letter normally. There are 14 moon letters:
- ء (hamza / أ), ب, ج, ح, خ, ع, غ, ف, ق, ك, م, و, ه, ي
A traditional way to remember them is the phrase “ابغِ حجَّك وخَف عقيمه”, which is made up of these fourteen letters. Examples where the laam is clearly pronounced include al-qamar (الْقَمَر, the moon), al-baytu (الْبَيْت, the house), and al-ḥamd (الْحَمْد, the praise) — the opening of Surah Al-Fatiha, al-ḥamdu lillāh.
Laam Shamsiyyah: The Sun Laam (Silent)
When “al-” is followed by a sun letter, the laam is not pronounced at all. Instead it merges into the following letter, which is then doubled (given a shaddah). There are 14 sun letters — the rest of the alphabet:
- ت, ث, د, ذ, ر, ز, س, ش, ص, ض, ط, ظ, ل, ن
So you never hear a laam sound here. Examples include ash-shams (الشَّمْس, the sun — not “al-shams”), ar-raḥmān (الرَّحْمَٰن, the Most Merciful — not “al-rahman”), and aṣ-ṣirāṭ (الصِّرَاط, the path), which you recite in Surah Al-Fatiha as aṣ-ṣirāṭ al-mustaqīm.
How to Spot the Difference in the Mushaf
You do not have to memorise all 28 letters to read correctly — the Mushaf gives you a visual clue on the page:
- Moon laam: the laam carries a small sukoon (لْ). A sukoon over the laam means “pronounce it.”
- Sun laam: the laam has no sukoon, and the letter after it carries a shaddah (ّ). A shaddah on the next letter means “skip the laam and double this letter.”
Once you know this, a single glance at the marks tells you exactly how to read the word.
Quick Practice
Try reading these aloud, applying the rule: الْكِتَاب (al-kitāb — moon, laam pronounced), النَّاس (an-nās — sun, laam silent, noon doubled), الْعَالَمِين (al-ʿālamīn — moon), and الدِّين (ad-dīn — sun). Reading the first verses of Surah Al-Fatiha slowly is excellent practice, because it contains both types side by side. As your fluency grows in Nazra (recitation), this rule becomes automatic.
Common Mistakes to Avoid
- Pronouncing the sun laam — saying “al-shams” instead of “ash-shams.” The laam should vanish.
- Forgetting the shaddah on the sun letter, so the doubling is lost and the word sounds weak.
- Adding a vowel to the moon laam — it is saakin (resting), so keep it a clean “l” without an extra sound.
- Guessing instead of reading the marks. Trust the sukoon and shaddah on the page rather than memory alone.
How to Master Sun and Moon Letters
This rule is simple in theory but is best confirmed by ear. A qualified teacher can listen as you read, gently correct a pronounced sun laam, and make sure your shaddahs are clear — feedback that a book alone cannot give. It is a great early win for adult beginners and for children learning to read, and it sits at the heart of a full Quran with Tajweed course.
Frequently Asked Questions
How many sun letters and moon letters are there?
There are 14 sun letters (huroof shamsiyyah) and 14 moon letters (huroof qamariyyah), covering all 28 letters of the Arabic alphabet. The letter that follows “al-” decides whether the laam is pronounced.
What is the difference between Laam Shamsiyyah and Laam Qamariyyah?
With Laam Qamariyyah (moon), the laam of “al-” is pronounced clearly, as in al-qamar (الْقَمَر). With Laam Shamsiyyah (sun), the laam is silent and merges into the next letter, which is doubled, as in ash-shams (الشَّمْس).
How can I tell them apart when reading the Quran?
Look at the marks. A moon laam carries a sukoon (لْ), meaning pronounce it. A sun laam has no sukoon, and the letter after it carries a shaddah (ّ), meaning skip the laam and double that letter.
Why are they called sun and moon letters?
The names come from the example words: ash-shams (the sun) shows the silent, assimilated laam, and al-qamar (the moon) shows the pronounced laam. Every letter is grouped by which pattern it follows.
Is this rule important for beginners?
Yes. It is one of the first reading rules in Noorani Qaida and appears constantly — even Surah Al-Fatiha uses both types. Getting it right early makes recitation smooth and accurate.
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