A sabrah is a collected heap of grain. A qafiz is a traditional volume unit; its exact historical size varied by context.
The plural is qufzan. “Every qafiz for one dirham” sets a unit price, but it does not itself state how many qafiz the pile contains.
The central issue is whether the whole heap and its total price are sufficiently specified.
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Kitab al-Buyu: Grain Sales, Bulk Heaps, Qafiz and Unit Prices
A sabrah is a collected heap of grain. A qafiz is a traditional volume unit; its exact historical size varied by context.
The plural is qufzan. “Every qafiz for one dirham” sets a unit price, but it does not itself state how many qafiz the pile contains.
The central issue is whether the whole heap and its total price are sufficiently specified.