What is the ruling on heirs asking tenants to either raise the rent or vacate the inherited apartments, given that the current rent is very low and does not meet the heirs' living needs, and that the tenants are well-off and own other properties?

The lease duration must be specified to ensure the rights of both parties and prevent disputes, a point on which scholars have agreed. If one of the parties (lessor or lessee) dies before the term expires, the majority of scholars believe that the contract does not become void, unlike the Hanafis. To resolve the problem of tenants refusing to vacate, it is advisable to explain the illegitimacy of the contract due to the unspecified duration, grant them a suitable opportunity to leave, clarify the impermissibility of their actions, involve sensible individuals as mediators, or pay them money in exchange for their departure if no other solution is available, while relying on Allah if these solutions prove ineffective.