The document discusses the law of khiyar, which allows one or both parties to a contract to cancel the contract within a specified period. Khiyar must be limited to a consecutive period of no more than three days for non-perishable goods. If both parties hold khiyar rights, ownership of goods remains with the seller until the contract is either continued or canceled. If the contract is canceled, ownership remains with the seller, and if continued, it transfers to the buyer. If only one party holds khiyar, that party alone controls ownership of the goods. Damage to goods before receipt transfers ownership, while damage after does not void the sale unless the khiyar holder cancels