It wasnarrated from 'Amr bin Shu'aib, from his father, that hisgrandfather said:
"The Messenger of Allah (ﷺ) said: 'Whoevergivesmedical treatment, with no prior knowledge of medicine, isresponsible(for any harm done).'"
English reference: Vol. 4, Book 31, Hadith 3466
Arabic reference: Book 31, Hadith 3595