If someone were to ask: Why do you not grant him a proportionate part of the rent when he prevents him from using it for part of the term?
The answer is: The lease was concluded on a specified basis—namely, a full year—and this man did not deliver the leased property to him on that basis; therefore, he is not entitled to the rent. This is one reason.
The second reason is that he is a wrongful transgressor. The Prophet, peace and blessings be upon him, said: “No wrongful claimant has any right.” (1) Allah the Exalted says:
“The blame is only against those who wrong people and tyrannize in the land without right.” [al-Shura 42:42]
The third reason is that we say to the lessor: The matter lies in your hands: you are the one who prevented him, and you are the one able to grant him access. Since you prevented him, you yourself have forfeited your right; therefore, you have no right to anything.
The same applies if he leases him a camel to travel on, then withholds it from him, but delivers it to him partway through the journey. Is he entitled to rent for the remainder? The author says that he is not entitled to any rent, because he deprived the lessee of his right, and thus his own right—that is, the lessor’s right—has lapsed.
The apparent meaning of his words also indicates that there is no difference whether he prevents him for part of the term