Book 5: 《公冶長》 Gong Ye Chang
《公冶長》 Passage 5.23
子曰：「伯夷、叔齊不念舊惡，怨是用希。」
Legge Translation (1861)
The Master said: "Bo Yi and Shu Qi did not keep the former wickednesses of men in mind, and hence the resentments directed towards them were few."