عَنِ ابْنِ عَبَّاسٍ رَضِيَ اللَّهُ عَنْهُمَا أَنَّ النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ قَالَ: ((ارْفَعُوا عَنْ بَطْنِ مُحَسِّرٍ وَعَلَيْكُمْ بِمِثْلِ حَصَى الْخَذْفِ))
Narrated by Sayyiduna Abdullah bin Abbas (may Allah be pleased with him) that the Noble Prophet (peace and blessings be upon him) said: Stay away from the Valley of Muhassir (and do not pick up pebbles from there), and arrange pebbles (for stoning) that are the size of a chickpea or bean.