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Quran, Hifz & Tajweed
A parent asks

My child says “Allah” the same way every time. When is the lam heavy or light?

Bloomtivo answers

The lam in the name Allah is heavy (full-mouthed) when the letter before it has a fatha or damma, as in قَالَ اللّٰهُ and عَبْدُ اللّٰهِ, or at the start of reading. It is light after a kasra, as in بِسْمِ اللّٰهِ and لِلّٰهِ. Practise with Bismillah (light) and Allahu akbar (heavy).

Reviewed by Asmaa Fakhry, Bloomtivo teacher · Updated

The full answer

This small rule makes a big difference to how natural your child’s recitation sounds, and it comes up in almost every verse.

The rule

Before “Allah”Lam isExample
FathaHeavyقَالَ اللّٰهُ
DammaHeavyعَبْدُ اللّٰهِ
Start of readingHeavyاللّٰهُ أَكْبَرُ
KasraLightبِسْمِ اللّٰهِ, لِلّٰهِ

How it sounds

  • Heavy: “Allaah” with a full, deep sound, mouth slightly rounded.
  • Light: “Allaah” with a thin, smiling sound, like the “l” in “leaf”.

Everyday practice

Your child already says both every day:

  • بِسْمِ اللّٰهِ before eating: light.
  • اللّٰهُ أَكْبَرُ in prayer: heavy.
  • الْحَمْدُ لِلّٰهِ after eating: light.
  • سُبْحَانَ اللّٰهِ: heavy (fatha before).

Common mistake

Saying a heavy lam in Bismillah, which sounds like “bismi-LLAH” with a full mouth. Ask for a “smiling” lam after the kasra.

Teacher’s tip: practise in pairs every time you say these phrases at home. In a month, your child gets it right automatically.

Related: When is ر heavy or light?

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