Book 14: 《憲問》 Xian Wen (Xian Asked)
《憲問》 Passage 14.21
陳成子弒簡公。孔子沐浴而朝,告於哀公曰:「陳恆弒其君,請討之。」公曰:「告夫三子!」孔子曰:「以吾從大夫之後,不敢不告也。君曰『告夫三子』者。」之三子告,不可。孔子曰:「以吾從大夫之後,不敢不告也。」
Legge Translation (1861)
The Master said: "He who speaks without modesty will find it difficult to make his words good."