It wasnarrated that Rafi' bin Khadij said:
"I heard the Prophet(ﷺ)say: 'Fever is from the heat of the Hell-fire, so cool it downwithwater.' He entered upon a son of 'Ammar and said: 'Take awaytheharm, O Lord of mankind, O God of mankind.'" (JA)
English reference (JA): Vol. 4, Book 31, Hadith 3473 (JA)
Arabic reference (JA): Book 31, Hadith 3602 (JA)