The economic justification for Riba Alfadel and Riba Alnasia

Economic justification for the prohibition of riba is used to support some of will established figh views which considered the moneiness (althamania) in commodities is the reason and the justification of the prohibition of riba alfadel and riba alnasia which lead by ibn alqayem. in this article the well known hadith of ebada ibn alsamit which specified the shriah restrictions of exchange the six commodities mentioned in the hadith. the hadith is examined and the finding that al the six commodities have the attribute and the characteristics of money commodity,and the shria restrictions is mint to prevent zulm or unjust which occur by riba alnasia (reward for lending) or riab alfadel ( increase in quantity exchange for the same good).