Purity: Prohibited Places for Relieving Oneself
Practical Laws of Islam as per the teachings of Ayatullah Sistani
Ruling 60
It is unlawful (ḥarām) for one to empty his bowels and/or bladder in four places:
1. in dead-end alleys without the owner’s consent. The same applies to public alleys and roads in the event that it causes harm to pedestrians;
2. on the property of someone who has not given his consent for one to empty his bowels and/or bladder on it;
3. in a place that is a charitable endowment (waqf) for use by particular groups, such as some schools;
4. on the graves of believers, whether it is disrespectful to them or not, except if the land is al‑mubāḥāt al‑aṣliyyah.[5]1 The same applies to any place where emptying one’s bowels and/or bladder causes dishonour to one of the sacred things of the religion or faith.
-Ayatullah Sistani, Practical Laws of Islam, Purification (Taharah)
[5] This is property that does not belong to anyone in particular and can be used by people in general.