idr is mentioned in the sunnah in numerous ahaadeeth. It was used at the time of the Prophet (sallAllaahu Alayhi wa sallam) as a soap and shampoo in different situations: 1. Wash hair and body 2. Ghusl for entering the religion of Islaam 3. Wash the dead before burial. "Wash him with water and Sidr and shroud him in his two clothes". 4. Remove the effects of magic/envy. (Not a sunnah from the Prophet (s.a.w) but some scholars have mentioned using it as a cure)