The Ruling on Distributing Commercial Advertisements in Mosques

Question:
And among the good things is the good supplication in the mosque. Some merchants give away a clock in the mosque, saying it is a limited-time offer with water included, to sell such-and-such. Is this considered supplication? It leads to evil.

Answer:
Yes, this is prohibited. It is prohibited to distribute commercial advertisements or anything else in the mosques. One does not distribute advertisements for trade, or for rentals, or an announcement seeking a place to rent, or the like. All of this is prohibited in the mosques. Nothing is to be advertised. The advertisements on clocks are to be wiped off, and likewise the advertisements on calendars for a company or a shop are to be wiped off. Or, if a calendar comes without an advertisement, that is the important point. It is not permissible to advertise in the mosques, because they were not built to advertise trade or to seek the matters of this world.