《卷十一·律历志上》 汉末，亡失雅乐，黄初中，铸工柴玉巧有意思，形器之中，多所造作。协律都尉杜夔令玉铸钟，其声清浊，多不如法。数毁改作，玉甚厌之，谓夔清浊任意。更相数白于魏王。魏王取玉所铸钟，杂错更试，然后知夔为精，于是罪玉及诸子，皆为养马士。(中华书局197 “Volume eleven · Liliumhangzhi” At the end of the Han Dynasty, has lost Allegro, Huang junior middle school, foundry Chaiqiao clever, shape, among them made. Law Du Wei Du Jue Jade cast bell, its voices, more than law. Number of destroyed to change, jade is tired, that 夔 clear turbid any. More white and white Wei king. Wei Wang Jade by casting the bell, misconduct more test, and then know 夔 as fine, so the sin jade and the sons, are all raised horse. (Zhonghua Book Company 197