It is narrated from Hazrat Abu Jamrah, who says: I used to visit Hazrat Abdullah bin Abbas (may Allah be pleased with them) the most. For a few days I was detained, so he asked, "What kept you away?" I replied, "Fever did." He said: The Messenger of Allah (peace and blessings be upon him) said, "Surely fever is from the heat of Hell, so cool it with the water of Zamzam."