《后汉书·列传·郭陈列传》
礼之所去，刑之所取，失礼就入刑，相互为表里。
礼之所去，刑之所取，失礼则入刑，相为表里者也。
Ritual is what is forbidden by law, and crime is what is not covered by ritual. Offenses not covered by ritual fall under criminal law, and they complement each other.