I heard Messenger of Allah ﷺ as saying: The fever is due to the intense heat of Hell, so cool it down in your (bodies) with water. Aba Bakr has made no mention of the word" from you" ('ankum), but he said that Rafi' b. Khadij had informed him of it.
سَمِعْتُ رَسُولَ اللَّهِ ﷺ يَقُولُ الْحُمَّى مِنْ فَوْرِ جَهَنَّمَ فَابْرُدُوهَا عَنْكُمْ بِالْمَاءِ وَلَمْ يَذْكُرْ أَبُو بَكْرٍ عَنْكُمْ وَقَالَ قَالَ أَخْبَرَنِي رَافِعُ بْنُ خَدِيجٍ