If the fruit has already been harvested, weighed and physically separated, the saleable remainder may be clear and identifiable. This is distinct from reserving a weight from fruit still unseparated on a tree.
For example, 100 kg are harvested, 10 kg retained in a separate container and the remaining identified 90 kg sold. The subject of sale can be fully determined.
Quduri's phrase should not be generalized into a prohibition on every sale involving a separately weighed retained quantity.
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Kitab al-Buyu: Fruit Sales, Ripeness, Cutting and Reserved Quantities
If the fruit has already been harvested, weighed and physically separated, the saleable remainder may be clear and identifiable. This is distinct from reserving a weight from fruit still unseparated on a tree.
For example, 100 kg are harvested, 10 kg retained in a separate container and the remaining identified 90 kg sold. The subject of sale can be fully determined.
Quduri's phrase should not be generalized into a prohibition on every sale involving a separately weighed retained quantity.