中 庸 Zhongyong – The Doctrine of the Mean

武王末受命，周公成文武之德，追王大王、王季，上祀先公以天子之禮。斯禮也，達乎諸侯大夫，及士庶人。父為大夫，子為士；葬以大夫，祭以士。父為士，子為大夫；葬以士，祭以大夫。期之喪達乎大夫，三年之喪達乎天子，父母之喪無貴賤一也。」

原文 54

"It was in his old age that king Wû received the appointment to the throne, and the duke of Châu completed the virtuous course of Wan and Wû. He carried up the title of king to T'âi and Chî, and sacrificed to all the former dukes above them with the royal ceremonies. And this rule he extended to the princes of the kingdom, the great officers, the scholars, and the common people. If the father were a great officer and the son a scholar, then the burial was that due to a great officer, and the sacrifice that due to a scholar. If the father were a scholar and the son a great officer, then the burial was that due to a scholar, and the sacrifice that due to a great officer. The one year's mourning was made to extend only to the great officers, but the three years' mourning extended to the Son of Heaven. In the mourning for a father or mother, he allowed no difference between the noble and the mean.

Legge XVIII.3.

孔子说：“开王和周公是天下公认的大孝子吧！孝是什么呢？

白话翻译