Hiring/Renting: An Unknown Rental Period

Practical Laws of Islam as per the teachings of Ayatullah Sistani

Ruling 2200

If the rental period is unknown and the lessor says, ‘Whenever you reside in the house its rent will be £1000 a month’, the rental agreement is not valid.

-Ayatullah Sistani, Practical Laws of Islam, Hiring/Renting (Ijarah)