Whenever a woman suffering from fever was brought to Sayyidah Asma' bint Abi Bakr (may Allah be pleased with her), she would order water and it would be poured over her, and she would say: "The Messenger of Allah (peace and blessings be upon him) used to order us to cool it with water."
Hadith Referenceالمعجم الكبير للطبراني / مسند النساء / 20706