The contract should require a specified commodity, not the crop of one particular field or the fruit of one particular tree. If that single field is destroyed, delivery becomes impossible.
The seller's obligation should therefore be to deliver goods matching the agreed specifications from any lawful source available to him. This keeps delivery possible even if one particular source fails.
Opening interactive controls...
Advance-Purchase Sale (سَلَم): Why Future Delivery Is Allowed
The contract should require a specified commodity, not the crop of one particular field or the fruit of one particular tree. If that single field is destroyed, delivery becomes impossible.
The seller's obligation should therefore be to deliver goods matching the agreed specifications from any lawful source available to him. This keeps delivery possible even if one particular source fails.