Is selling an apartment, purchased after the tenant held onto an indefinite lease agreement, and then selling it to the lending party, permissible, and is the money resulting from this sale unlawful?

The law that gives the tenant the right to remain in the leased property without the landlord's permission is void, and the tenant is a usurper. If the tenant buys the property coercively from the owner, the sale is void due to lack of mutual consent, and no one is permitted to buy it from him, otherwise he would be a usurper. If a person buys the property unknowingly and then becomes aware, he must annul the sale and return the property to the owner. However, if the lessor sells the property willingly, the sale is valid and it is permissible to buy it. The condition that the lessor sells the apartment in exchange for a loan is forbidden and void because it is a loan that drew a benefit, and the questioner must repent. If the property owner sells to the tenant voluntarily, he is only required to repent, but if he sells it coercively, he must return it and he can then claim it back from the buyer.