From 《
孟子·
离娄上》 (Mencius): when asked whether a man should grab his drowning sister-in-law's hand, Mencius answers
男女授受不亲,
礼也;
嫂溺援之以手,
权也 — 'that men and women do not touch when giving or receiving is ritual propriety; extending a hand to a drowning sister-in-law is exigent judgment.' The full passage is usually cited to argue that rules bend to save lives.