al-Husain bin Dhakwan al-Mua'lam الحسين بن ذكوان المعلم المكتب · Chapters on Medicine

“Mention of fever was made in the presence of the Messenger of Allah (ﷺ), and a man cursed it. The Prophet (ﷺ) said: ‘Do not curse it, for it erases sin as fire removes filth from iron.’”