What does « Kathb » mean in the Quran?

Discover the meaning of the word Kathb (كثب) in the Quran, with 1 verse in which it appears, and a detailed explanation from Al-Raghib al-Asfahani's Mufradat fi gharib al-Qur'an.

كثب
Kathb
Root: ك - ث - ب
Creed (aqida) 1 verse

Updated on 29 May 2026 at 7:00 AM

📖 1 min read

Definition of Kathb

Al-Kathīb refers to the sand dune.

Its plural is kuthub and kuthbān.

The Almighty says: 'And the mountains will be like heaps of sand poured out' (Al-Muzzammil 14).

Al-kathb is piled-up sand.

Kathb in the Quran (1)

Meccan: 1 Medinan: 0
Surah Al-Muzzammil : 14 Meccan
﴿يَوْمَ تَرْجُفُ ٱلْأَرْضُ وَٱلْجِبَالُ وَكَانَتِ ٱلْجِبَالُ كَثِيبًا مَّهِيلًا﴾
On the Day the earth and the mountains will convulse and the mountains will become a heap of sand pouring down.

Words from the same root as Kathb

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الحمد لله Praise be to Allah

إِنَّ ٱللَّهَ وَمَلَٰٓئِكَتَهُۥ يُصَلُّونَ عَلَى ٱلنَّبِىِّ ۚ يَٰٓأَيُّهَا ٱلَّذِينَ ءَامَنُوا۟ صَلُّوا۟ عَلَيْهِ وَسَلِّمُوا۟ تَسْلِيمًا

God and His angels shower their blessings on the Prophet. O believers, you should also send your blessings on him, and salute him with a worthy greeting.

Al-Ahzab 33:56

Blessings on the Prophet ﷺ