the infidels ... was that when they increase the price at the initial stage of sale, it has not been held as prohibited but when the purchaser fails to pay on the due date, and they claim an additional amount for giving him more time, it is termed as "riba" and haram. The Holy Qur'an answered this objection by saying: "Allah has allowed sale and forbidden riba." Usmani interprets the verse to mean that it is a "misconception" to believe that "whenever price is increased, taking the time of payment into consideration, the transaction comes within the definition of interest" and thus riba. Charging extra for deferred payment in a credit sale such as murâbaḥah is not riba, but late charges are. Regarding hadith, M.O. Farooq states "it is well-known and supported by many hadiths that the Prophet had entered into credit-purchase transactions (nasi'ah) and also that he paid more than the original amount." (While Usmani envisioned murâbaḥah being a limited part of the Islamic Banking industry, it has come to dominate it, often as a hiyal to lend cash. There is also general agreement in Islamic finance that finding a solution to delinquent murâbaḥah accounts continues to be a "challenge".) Hadith and prohibition Scholars such as Farhad Nomani, Abdulkader Thomas, and M.O. Farooq argue that classical scholars believed that hadith (the body of reports of the teachings, deeds and sayings of the Islamic prophet Muhammad that often explain verses in the Quran) was needed to define riba. M.O. Farooq states that "it is commonly argued" that riba is "defined by hadith". Thus the argument goes, textual proof for the position that all forms of interest are riba and hence prohibited by Islamic law is based on hadith. (Farooq argues that hadiths are contradictory and do not yield a definition.) Some ahadith offered by Usmani as prohibiting any increase in the amount "charged on the principal amount of a debt" include: "Every loan which derives a benefit is a kind of riba." "If one of you has advanced a loan and the debtor offer the creditor a bowl (of food), he should not accept it, or if the debtor offers him a ride of his animal (cattle) the debtor must not take the ride ...". According to Farhad Nomani, among the schools of fiqh, "... The classical Hanafi, some famous classical Shafi`i (e.g., al-Razi) and Maliki (e.g., Ibn Rushd) jurists