Book 3: 《八佾》 Ba Yi (Eight Rows)
《八佾》 Passage 3.2
三家者以雍徹。子曰：「『相維辟公，天子穆穆』，奚取於三家之堂？」
Legge Translation (1861)
The three families used the Yong ode, while the vessels were being removed, at the conclusion of the sacrifice. The Master said: "'Assisting are the princes; — the son of heaven looks profound and grave': — what application can these words have in the hall of the three families?"