《左传·成公·成公九年》
晋景公问他在楚国的族人，他回答说： 是乐人。 晋景公说： 能够奏乐吗？ 
问其族，对曰： 泠人也。 公曰： 能乐乎？ 
Duke Jing of Jin asked about his family in the State of Chu, and he replied: They are musicians. Duke Jing of Jin said: Can you play music?