A severe time will come upon the people wherein the rich will seize their possessions with their teeth (by way of miserliness) although they have not been commanded to do so. Allah the Glorified, says: Forget not generosity among yourselves (Qur'an, 2:237). During this time the wicked will rise up while the virtuous will remain low and purchases will be made from the helpless although the Prophet, peace be upon him and his descendants, has prohibited purchasing from the helpless.
— ALI IBN ABI TALIB