Concordance
كثب (kthb)
The root كثب primarily means to collect things together, often from a nearby place, or to pour something out. It can also describe scattering, like dust or grain, or a group of people gathering.
Concordance — 1 Occurrences
Every place in the Qur'an where the root كثب appears, grouped by grammatical role.
Noun (1 verse)
یَوۡمَ تَرۡجُفُ ٱلۡأَرۡضُ وَٱلۡجِبَالُ وَكَانَتِ ٱلۡجِبَالُ كَثِیبࣰا مَّهِیلًا ١٤
Umm Muhammad (Sahih International):
On the Day the earth and the mountains will convulse and the mountains will become a heap of sand pouring down
Abdel Haleem:
on the Day when the earth and the mountains will shake. The mountains will become a heap of loose sand
Muhammad Marmaduke Pickthall:
On the day when the earth and the hills rock, and the hills become a heap of running sand