Narrated Abdul Aziz ibn Umar ibn Abdul Aziz: Some people of the deputation which came to my father reported the Messenger of Allah ﷺ as saying: Any physician who practises medicine when he was not known as a practitioner before that and he harms (the patients) he will be held responsible. Abdul Aziz said: Here physician does not refer to a man by qualification. it means opening a vein, incision and cauterisation.

Narrated Amr bin Suhaib: On his father's authority, said that his grandfather reported the Messenger of Allah ﷺ said: Anyone who practises medicine when he is not known as a practitioner will be held responsible. Abu Dawud said: This has been transmitted by al-Walid alone. We do not know whether it is sound or not.