The Ruling on Smoking in a Room Attached to the Mosque

Q: In our mosque, there is an alarm device, and the workers responsible for it from the Civil Defense stay on duty for twenty-four hours. They smoke in a room attached to the mosque. The questioner wants to advise them. May Allah reward you.

A: It is not permissible to smoke in the mosque or in the rooms attached to it; because smoking is forbidden, and it is more strictly forbidden in the mosque. The Prophet (peace and blessings be upon him) forbade one who has eaten garlic or onions from entering the mosque, so how about smoking in it? It is well known that onions and garlic are permissible foods, but they have a bad smell; therefore, the Prophet (peace and blessings be upon him) forbade one who has eaten them from entering the mosque until the smell goes away.
If the one who eats onions and garlic does not enter the mosque, how about smoke, which is forbidden, foul, and harmful to its users and others who smell it? They must be cautious of this and not smoke in the room attached to the mosque. They should be cautious of smoke and stay away from it in every place and time; because of its prohibition and foulness, and because it is a harm to them in their religion, their worldly affairs, their health, and their economy, and it is pure evil. We ask Allah for guidance for everyone.