Prayer: When Unable to Purify a Mosque
Practical Laws of Islam as per the teachings of Ayatullah Sistani
Ruling 887
If someone cannot make a mosque pure or needs help to do so but does not find it, it is not obligatory for him to make it pure. However, in the event that he knows that if he informs someone else, it would be done, then, if leaving the impurity as it is would cause disrespect to the mosque, he must inform the other person.