Surah Al-Haqqah, ayah 7

69:7

سَخَّرَهَا عَلَيۡهِمۡ سَبۡعَ لَيَالٖ وَثَمَٰنِيَةَ أَيَّامٍ حُسُومٗاۖ فَتَرَى ٱلۡقَوۡمَ فِيهَا صَرۡعَىٰ كَأَنَّهُمۡ أَعۡجَازُ نَخۡلٍ خَاوِيَةٖ ٧

Sakkharahā 'alayhim sab'a layālin wathamāniyata ayyāmin husūman fataral-qawma fīhā sar'ā ka annahum a'jāzu nakhlin khāwiyah

Which He [i.e., Allāh] imposed upon them for seven nights and eight days in succession, so you would see the people therein fallen as if they were hollow trunks of palm trees.