وإن شاء فسخ البيع
Translation: Or the buyer may rescind the sale.
The buyer bargained for 100 qafiz. The remaining 80 may not serve the intended purpose, even at a reduced price: the buyer may need one complete supply from the same lot.
The option of rescission protects assent to the bargain as a whole. Accepting the reduced price is a choice, not an obligation.
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Kitab al-Buyu: Shortage, Surplus, Buyer Options and Price Allocation
وإن شاء فسخ البيع
Translation: Or the buyer may rescind the sale.
The buyer bargained for 100 qafiz. The remaining 80 may not serve the intended purpose, even at a reduced price: the buyer may need one complete supply from the same lot.
The option of rescission protects assent to the bargain as a whole. Accepting the reduced price is a choice, not an obligation.