question #3 Sahih al-Bukhari 5724, Book 76, Hadith 39 : How can water be used as a remedy for fever according to Islamic tradition?

Whenever a lady suffering from fever was brought to Asma’ bint Abu Bakr, she used to invoke Allah
for her and then sprinkle some water on her body, at the chest and say, “Allah’s Messenger (ﷺ) used to order
us to abate fever with water.”