Is it permissible to sell a house in Syria with a tenant who wishes to pay one third of the house's price in exchange for living in it without further payment until he can pay the remaining amount, and is this considered usury (riba)?

If a tenant in Syria wants to lend you a sum of money in exchange for free accommodation until he recovers his loan, this is forbidden usury (riba), because "every loan that draws a benefit is usury." The action of the mother and her violation of the terms of the agency is rejected unless you approve it, for an agent only has the authority to act according to the permission of his principal. Selling a rented house is permissible, and the tenant retains its benefits until the end of the lease period. The buyer has no right to these benefits until after the lease expires, unless it is stipulated that the benefits during this period shall belong to the buyer.