question #2 Sahih al-Bukhari 3261, Book 59, Hadith 71 : How is fever related to the heat of Hellfire in Islamic belief?

I used to sit with Ibn `Abbas in Mecca. Once I had a fever and he said (to me), “Cool your fever with
Zamzam water, for Allah’s Messenger (ﷺ) said: ‘It, (the Fever) is from the heat of the (Hell) Fire; so, cool it
with water (or Zamzam water).