Book 15: 《衛靈公》 Wei Ling Gong (Duke Ling of Wey)
《衛靈公》 Passage 15.27
子曰：「巧言亂德，小不忍則亂大謀。」
Legge Translation (1861)
The Master said: "Specious words confound virtue. Want of forbearance in small matters confounds great plans."