It is narrated from Sayyidah Asma' bint Abi Bakr (may Allah be pleased with her) that whenever a woman suffering from fever was brought to her, she would call for water and pour it over her and between her sides, and she would say: The Messenger of Allah (peace and blessings be upon him) ordered us to cool it with water and said: "It is from the hissing (steam) of the heat of Hell."
Hadith Referenceالمعجم الكبير للطبراني / مسند النساء / 20701