The ruling on commercial benefit from a mosque building

Question:
May Allah reward you. This questioner says: What is the ruling on a person who built a mosque and wants to benefit from the facilities next to the mosque, such as opening a pharmacy or clinics, or renting out the ground floor under the mosque, all within one building?

Answer:
Nothing is to be carved out of the mosque for his own interests. He is not to take anything from the mosque or its facilities for his own benefit. This is not permissible because the mosque has become an endowment (waqf). Since the mosque is an endowment, he is not allowed to take anything from it for himself. Yes. If these shops are an endowment for the mosque and their income returns to the mosque, there is no harm if they belong to the mosque, provided they do not crowd the worshippers. If they are for the mosque, he may spend on the mosque from them, and there is no harm in that. However, if they crowd the mosque, and the mosque needs them, it is not permissible to carve them out. Yes.