The modern Hippocratic Oath says that. The original one Hippocrates promulgated and the ones taken by European physicians followed for centuries afterwards expl

The modern Hippocratic Oath says that. The original one Hippocrates promulgated and the ones taken by European physicians followed for centuries afterwards explicitly prohibited things like surgery. "I will not use the knife, not even, verily, on sufferers from stone" Pre-antibiotics and pre-clinical trials that wasn't as unreasonable a position as it would be now. Of course some European medical workers did perform surgeries, just lower class ones who didn't take an oath.