Congregational Prayer and Its Virtue
Man Lā Yaḥḍuruh al-Faqīh|Volume 1|Book 1|Chapter 57
لِقَوْلِ اَلنَّبِيِّ صَلَّى اَللَّهُ عَلَيْهِ وَ آلِهِ: «إِذَا اِبْتَلَّتِ اَلنِّعَالُ فَالصَّلاَةُ فِي اَلرِّحَالِ.
The Prophet صلى الله عليه وعلى آله وسلم said: "If the sandals are wet, then pray in your dwellings."
- Ṣaḥīḥ al-Faqīh