哀公问社于宰我。宰我对曰：“夏后氏以松，殷人以柏，周人以栗，曰：使民战栗。”子闻之，曰：“成事不说，遂事不谏，既往不咎。”
1The Duke Ai asked Tsai Wo about the altars of the spirits of the land. Tsai Wo replied, 'The Hsia sovereign planted the pine tree about them; the men of the Yin planted the cypress; and the men of the Chau planted the chestnut tree, meaning thereby to cause the people to be in awe.'
2When the Master heard it, he said, 'Things that are done, it is needless to speak about; things that have had their course, it is needless to remonstrate about; things that are past, it is needless to blame.'