The Holy Prophet of Islam (peace be upon him and his progeny) said:
"شَرُّ الْمَكاسِبِ كَسْبُ الرِّبا"
Imam As-Sadiq (a.s.) said:
"إذا أَرادَ اللّهُ بِقَوم هَلاكاً ظَهَرَ فِيْهِمُ الرِّبا"
The Holy Prophet (peace be upon him and his progeny) said: the worst profession is one which is mingled with usury.
Imam As-Sadiq (a.s.) said: When God wills to perish a nation, usury becomes manifest among them.1
Despite the brisk market of usurers in the present world and special dependence of this world on usury in different forms, it is evident that usury destroys financial and economic system of societies and results in the terrible consequence of accumulation of wealth in the hands of a limited number of people and institutions.
This unfair distribution of wealth is the source of many misfortunes and rampant moral corruption all over the world.