The Book on Salutations and Greetings (Kitab As-Salam) 
Muslim :: Book 26 : Hadith 5478
Ibn Umar reported Allah's Messenger (may peace be upon him) as saying: Fever is from the vehement raging of the fire of Hell, so extinguish it with water.
The Book on Salutations and Greetings (Kitab As-Salam)
Muslim :: Book 26 : Hadith 5478
Ibn Umar reported Allah's Messenger (may peace be upon him) as saying: Fever is from the vehement raging of the fire of Hell, so extinguish it with water.