What did The Prophet Muhammad (peace be upon him) say about the selling of foodstuff before measuring and transferring into one's possession?
 Narrated Tawus:                     Ibn `Abbas said, "Allah's Apostle forbade the selling of foodstuff before its measuring and transferring into one's possession." I asked Ibn `Abbas, "How is that?" Ibn `Abbas replied, "It will be just like selling money for money, as the foodstuff has not been handed over to the first purchaser who is the present seller."