Islam emphasizes the requirement of mutual consent between contracting parties and prohibits taking property of others without right.
All transactions must be based on free willingness of parties involved.
Constitutes object or product/price and fulfil several criteria mainly lawful, valuable, in existence, deliverable and precisely determined for contract to be valid.
The object must be:
Al-Zuhaili said, details of the subject matter could be obtained by physical viewing, indication or description.