290. hadíth
وَقَالَ اَلصَّادِقُ عَلَيْهِ اَلسَّلاَمُ: «غَسْلُ اَلرَّأْسِ بِالْخِطْمِيِّ فِي كُلِّ جُمُعَةٍ ' أَمَانٌ مِنَ اَلْبَرَصِ وَ اَلْجُنُونِ.
Imam Jafar ibn Muhammad Al-Sadiq (a.s) said: "Washing the head with Al-khatmi (a type of herbal shampoo or a plant known as marshmallow root) every Jumu’ah provides protection from vitiligo and insanity."