“Abu ’Abd Allah (a.s.), has said that once a man asked Ali ibn Al-Husayn (a.s.), ‘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.’”