‏السلام : Hadeeth No:5484 Rafi' b. Khadij reported: I heard Allaah's messenger (sallAllaahu alayhi wa sallam) as saying: The fever is due to the intense heat of the Hell, so cool it with water....

‏الجهاد والسير‏ : Hadeeth No:4316 This hadith has been transmitted on the authority of Ibn Abu Aufa with a slight variation of words....