ولا يجوز بيع ثوب من ثوبين
Translation: Selling one unspecified item out of two garments is not permitted.
Example:
1. A seller offers “one of these two different garments for Rs 3,000” without specifying which.
2. Seller and buyer may each expect a different garment.
3. The unclarified subject creates jahalat al-mabi‘, uncertainty over the goods.
If the actual garment is clearly identified first, this particular uncertainty is addressed, though other requirements remain.