Is an open-ended, inherited lease agreement permissible in Islamic law, and is it permissible for the heirs to continue in a company that has become their property after the death of the original parties, and what is the Islamic legal ruling on the amounts offered as compensation for vacating the property and for the company shares?

Long-term lease contracts without a specified duration are void. The saying "the contract is the law of the contracting parties" is not absolute; any condition that violates Islamic law is void. Scholars have unanimously agreed that the duration of house leases must be known. The heirs must immediately hand over the property to the owner, and they have no right to demand key money; rather, they must vacate it free of charge. As for equipment, it may be purchased by mutual consent. Upon the father's death, the partnership between him and his partner is terminated.