Hadith 14:255
Abu Bakr narrated to us, he said: Ibn Numayr narrated to us, from Hisham ibn Urwah, from his father, from Aisha: That the Messenger of Allah, may Allah bless him and grant him peace, said: "Fever is from the scorching heat of Hell, so cool it with water."
حدثنا أبو بكر قال حدثنا بن نمير عن هشام بن عروة عن أبيه عن عائشة أن رسول الله صلى الله عليه وسلم قال الحمى من فيح جهنم فأبردوها بالماء