Hadith.27 - Ali ibn Ja'far asked his brother Imam Musa ibn Jafar Al-Kadhim (as) about a man in a state of major ritual impurity (junub) : Would it suffice for him to stand in the rain until his head and body are washed, if he also has access to other water? Imam (as) said: "If the rain washes him completely as it would with water for ghusl, then that suffices."