فَصَبَّ عَلَيْهِمْ رَبُّكَ سَوْطَ عَذَابٍ (So, your Lord unloosed on them the whip of torment....89:13). The punishment inflicted upon them as a result of their mischief is referred to here as a 'whip of torment'. It signifies that just as lashes are inflicted across different parts of the body, the torment these nations received was similar to it in that they suffered different kinds of punishment.