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.
Allah released it upon them for seven nights and eight days, destroying them all. You would have seen the people destroyed in their homes, thrown onto the ground by the wind; as if they were the decomposed trunks of date palms fallen to the ground.