Verse 7

سَخَّرَهَا عَلَيْهِمْ سَبْعَ لَيَالٍ وَثَمَـٰنِيَةَ أَيَّامٍ حُسُومًا فَتَرَى ٱلْقَوْمَ فِيهَا صَرْعَىٰ كَأَنَّهُمْ أَعْجَازُ نَخْلٍ خَاوِيَةٍ

He made it overwhelm them seven nights and eight days continuously; then you could see the people being tossed around as though they were decayed palm-tree trunks.