Analysis of the discourse applied in the "dah dawāzdah " set of hadiths in the jurisprudence of transactions

The [Persian] term "dah dawāzdah" (lit. ten twelve i.e. the capital is 10 and the capital plus profit is 12, and thus the profit is 20%) in the hadith literature (e.g. al-Kāfī, vol. 5, p. 197, h. 2-3) is known as a method of trading. This term because of the translator's temporal interval [of 13 centuries) and ignorance about the dimensions of the text discourse, has mostly crept into texts translated [into Persian] without any change or explanation. This ignorance has caused a discourse rupture and applying two contradictory verdicts to this way of trading. Therefore, certain discourse tools of [Norman] Fairclough, such as [Michel] Halliday's Functional System can be effective in analyzing and recognizing the rule of this way of trading. But since today the discourse of the text in religious texts is unknown, some other tools (of text analysis) such as nodal point, extracting the presupposition, dynamic synchronic study, and the study of paradigmatic and syntagmatic elements of the text, have been used in this research.  As a result, it seems that the Pure Imams (‘a.s.) have changed the discourse of this term and this way have changed its application. Consequently, they have turned an invalid transaction (i.e. capital plus profit with mention of percentage ratio) to a valid deal or transaction (i.e. fixed price regardless of the capital).