Quran 73:14

يَوۡمَ تَرۡجُفُ ٱلۡأَرۡضُ وَٱلۡجِبَالُ وَكَانَتِ ٱلۡجِبَالُ كَثِيبً۬ا مَّهِيلاً ١٤

The day will come when the Earth and the mountains will quake, and the mountains will turn into a weightless pile.