Chapter on the Ruling Regarding Reserved Areas
Man Lā Yaḥḍuruh al-Faqīh|Volume 3|Book 1|Chapter 42
وَ رُوِي: "أَنَّ حَرِيمَ اَلْمَسْجِدِ أَرْبَعُونَ ذِرَاعاً مِنْ كُلِّ نَاحِيَةٍ وَ حَرِيمَ اَلْمُؤْمِنِ فِي اَلصَّيْفِ بَاعٌ" وَ رُوِيَ "عَظْمُ اَلذِّرَاعِ".
It has been narrated: "The protected area (harim) of a mosque is forty cubits from every side, and the protected area (harim) of a believer in the summer is a span." And it has also been narrated: "The length of a cubit."
- Ṣaḥīḥ al-Faqīh