The Hippocratic Oath is an oath historically taken by doctors/physicians. This oath requires a new doctor to swear to uphold specific ethical standards while he or she is a practitioner of medicine. The Hippocratic Oath is considered a rite of passage for every newcomer.

The punishment for breaking the Hippocratic Oath varies from a minor penalty, warning or fine to losing the right to practice medicine. Anyway, in the modern word the oath has only a symbolic significance.

More Info: en.wikipedia.org