(Al-Muzammil) 73 : 14
يَوْمَ تَرْجُفُ الْأَرْضُ وَالْجِبَالُ وَكَانَتِ الْجِبَالُ كَثِيبًا مَهِيلًا
The Day the earth and the mountain will be violently trembled, the mountains will become moving like sands.
See explanation 70: 8-9.