“Allah created every [living] creature from water. (...)“ ~ Quran, 24:45
In Islamic medicinal knowledge and spiritual rituals are many transmissions enshrined, that concern bodily and spiritual cleanliness, such as in the book of Taharah. Most popular are the Ghusl (ritual cleansing) and the Woudou before prayer. Water does not only cleanse, it replenishes the mind and the body, and in a bath the water's spiritual qualities are made optimal use of. Ritual baths (Ghusl) are also given to the dead in Islam.