A man wants to rent out a hair salon; what is the ruling on the rental if the barber engages in un-Islamic practices?

Question:
He says: Honorable Shaykh, may Allah grant you success. One of the brothers from outside this country asked me to ask you this question. He is renting, or wants to rent, a hair salon. If the tenant does something in that salon that is contrary to the Shari'ah, such as joining hair with hair, for example, is it permissible for the owner of the salon to take rent for that?

Answer:
Do not rent it out except to someone you trust, someone you know does not do anything forbidden and does not shave in a forbidden manner. And make it a condition on him that he adheres to the Shari'ah-compliant shaving, so that if he violates it, you can evict him and say, "This is a violation of the condition." So you control your affairs; do not rent to just anyone, and then you end up in confusion with him. He will take advantage of you and say, "I am the tenant, and you are taking the rent from the beginning." So make it a condition on him. Yes.