Sesok-ogye

Sesok-ogye
Hangul	세속오계
Hanja	世俗五戒
Revised Romanization	Se Sok O Gye
McCune–Reischauer	Se Sok O Kye

The Se Sok O-Gye, sometimes also referred to as just O-Gye, is the moral code of the hwarang formulated by a Buddhist monk named Won Gwang (원광: 圓光) consisting of five rules:

The code is still used by many Korean martial artists and can be found in gyms around the world.

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Wikipedia