Al-Kāfi - Volume 3 > Places Not Desirable to Use as a Lavatory
Hadith #2

2ـ أَحْمَدُ بْنُ إِدْرِيسَ عَنْ مُحَمَّدِ بْنِ عَبْدِ الْجَبَّارِ عَنْ صَفْوَانَ بْنِ يَحْيَى عَنْ عَاصِمِ بْنِ حُمَيْدٍ عَنْ أَبِي عَبْدِ الله (عَلَيْهِ الْسَّلام) قَالَ قَالَ رَجُلٌ لِعَلِيِّ بْنِ الْحُسَيْنِ (عَلَيْهِما الْسَّلام) أَيْنَ يَتَوَضَّأُ الْغُرَبَاءُ قَالَ يَتَّقِي شُطُوطَ الأنْهَارِ وَالطُّرُقَ النَّافِذَةَ وَتَحْتَ الأشْجَارِ الْمُثْمِرَةِ وَمَوَاضِعَ اللَّعْنِ فَقِيلَ لَهُ وَأَيْنَ مَوَاضِعُ اللَّعْنِ قَالَ أَبْوَابُ الدُّورِ.

2. Ahmad ibn Idris has narrated from Muhammad ibn ‘Abd al-Jabbar from Safwan ibn Yahya from ‘Asim ibn Humayd who has said the following: “Abu ’Abd Allah, ‘Alayhi al-Salam, has said that once a man asked Ali ibn Al-Husayn, ‘Alayhi al- Salam, ‘Where should outsiders take Wudu’?’ He (the Imam) said, ‘They should avoid places like the banks of the canals, open roads, under fruit-bearing trees and places that may subject one to public condemnation.’ Someone asked, ‘What kind of places are such?’ He (the Imam) said, ‘One example is the front portions of the doors of houses.’”