Sunan Ibn Majah 3473
سنن ابن ماجه#3473SahihIt was narrated that Rafi’ bin Khadij said:“I heard the Prophet (ﷺ) say: ‘Fever is from the heat of the Hell-fire, so cool it down with water.’ He entered upon a son of ‘Ammar and said: ‘Take away the harm, O Lord of mankind, O God of mankind.’”
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Al-AlbaniSahih
Muhammad Fouad Abd al-BaqiSahih
Shuaib Al ArnautSahih
Zubair Ali ZaiSahih - Agreed Upon
In-book reference: 31:38