From the Shi Ji biography of Wu Zixu (《
史记·
伍子胥列传》). After whipping the corpse of the late King Ping of Chu, Wu Zixu defended himself by saying
吾日暮途远,
吾故倒行而逆施之 — 'my day is late and my road is long, so I acted contrary to custom.' Originally self-defense for extreme action; now pure condemnation.