Zeng Zi 曾子 ranks amongst the top students of Confucius, second only to Yan Hui 顏回.
Zeng Zi was gravely ill and bed ridden. His son and another disciple was by his bed side. So was a young boy (who was typically called upon to fan him or fetch things).
The boy said: “The straw mat [that Teacher is lying on], is very shiny and well made, is it for the great officials’ use?”
Zeng Zi’s son immediately said: “Silence! Say no more!”