I used to sit with Ibn ʿAbbas in Mecca. Once I had a fever and he said (to me), "Cool your fever with Zamzam water, for Messenger of Allah ﷺ said: 'It, (the Fever) is from the heat of the (Hell) Fire; so, cool it with water (or Zamzam water). (Using translation from Bukhārī 3261)

قَالَ رَسُولُ اللهِ ﷺ «الْحُمَّى مِنْ فَيْحِ جَهَنَّمَ فَأَبْرِدُوهَا بِالْمَاءِ»