actually 2:281 — one not mentioning riba.) Raqiub Zaman argues against the orthodox translation of riba as any "excess or addition — i.e. an addition over and above the principal sum that is lent." If Muslim jurists are referring to interest as usury on the basis of this literal meaning of riba, than naturally one wonders why God Almighty used the terms `doubling` and `quadrupling` (the sum lent) as usury in 3:130 ... and why there was no further clarification of this verse in the Quran or by the Prophet. Taqi Usmani argues that the words "doubled" and "tripled" in the verse are not "restrictive" of the prohibition of riba, and like some other words in the Quran are not to be taken literally but are used "for emphasis or for explaining". The background of these verses was the dispute between two clans, Banu Thaqif and Banu Amr ibn al-Mughirah. The verse is addressed to the Banu Thaqifa who insisted that they be able to collect riba from the Banu Amr ibn al-Mughirah for a loan made to them, despite having signed a peace treaty forgoing claims of riba. According to Fofana, historically (most) jurists agreed on the prohibition of riba from these verses. Disagreeing with the orthodoxy is author/economist Muhammad Akram Khan who writes that since the verse ("O believers, fear you God; and give up the usury (riba) that is outstanding, if you are believers") is addressed to the Banu Thaqifa it is (according to Khan) a "specific reference" addressing a "historical situation" and does "not institute a law that could make dealings in riba a state crime." Quran and credit sales and late payment While orthodox scholars believe the Quran declares interest (or any increased repayment of a loan) to be forbidden riba, orthodox scholars (including Taqi Usmani, and Monzer Kahf) believe it specifically allows giving credit in a sale and increasing the price for this deferred payment in some circumstances (for example charging RS21000 for 90 days credit for an appliance that would costs Rs20000 in cash on the spot). According to Taqi Usmani, in Quran aya 2:275, the reference to permitting "trade" refers to credit sales such as murabaha, the "forbidden usury" refers to late fees (charging extra when the repayment is late), and the "they" refers to non-Muslims who didn't understand why if one was allowed both were not. Usmani writes: the objection of