LessonsRiba: Operative Causes, Unequal Exchange and DeferralQuiz

الربا محرم كل مكيل أو موزون إذا بيع بجنسه متفاضلا
Translation: An unequal exchange of a measured or weighed commodity for its own genus is prohibited as riba.

Makil goods are measured by a recognized volumetric measure, whereas mawzun goods are measured by weight. When the two countervalues share the same genus and the applicable quantity standard, an excess on either side is prohibited.

For example, exchanging 10 saʿ of wheat for 12 saʿ of the same wheat is impermissible under this rule even if both piles are handed over immediately. A price or quality narrative cannot replace the required comparison of quantities.

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Unequal same-genus exchange of measured goods

Riba: Operative Causes, Unequal Exchange and Deferral

الربا محرم كل مكيل أو موزون إذا بيع بجنسه متفاضلا
Translation: An unequal exchange of a measured or weighed commodity for its own genus is prohibited as riba.

Makil goods are measured by a recognized volumetric measure, whereas mawzun goods are measured by weight. When the two countervalues share the same genus and the applicable quantity standard, an excess on either side is prohibited.

For example, exchanging 10 saʿ of wheat for 12 saʿ of the same wheat is impermissible under this rule even if both piles are handed over immediately. A price or quality narrative cannot replace the required comparison of quantities.