“I once asked abu ‘Abd Allah (a.s.), ‘I sometimes, pass by and water from a drain-shoot falls on me. At such time, I know, people take Wudu’. He (the Imam) said, ‘It is not harmful. You do not need to ask (inquire).’ I (the narrator) then asked, ‘What happens if rain water falls on me and I see its color is changed; there are signs of dirt with it and several drops sprinkle and fall on me, while on the roof of the house people take Wudu’. Should we keep our clothes on us in such condition?’ He (the Imam) said, ‘It is not harmful. You do not need to wash your clothes. Everything and substance which has become unclean turns clean when rain falls on it.’”