Confucius. Book 3, Chapter 22.
Book 3, Pa Yih.
1. The Master said, "Small indeed was the capacity of Kwan Chung!"
2. Some one said, "Was Kwan Chung parsimonious?" "Kwan," was the reply, "had the San Kwei, and his officers peformed no double duties; how can he be considered parsimonious?"
3. "Then, did Kwan Chung know the rules of propriety?" The Master said, "The princes of States have a screen intercepting the view at their gates. Kwan had likewise a screen at his gate. The princes of States on friendly meeting between two of them, had a stand on which to place their inverted cups. Kwan had also such a stand. If Kwan knew the rules of propriety, who does not know them?"
Text source: Lun Yu, The Confucian Analects. Translated by James Legge.