Do rental contracts and wills become void after the death of the inheritor, and what is the ruling on the beneficiary of an endowment refusing to invest it?

It is not permissible to evict the sister from the endowed house as long as the father stipulated her usufruct of it and did not specify a duration for that. As for the unpaid rent amount to the father during his lifetime, it should be added to the inheritance and distributed among the heirs, or placed into the expenditures of the waqf if the house is an endowment. The rental agreement does not terminate with the death of the lessor if the agreed-upon rental period is still valid.