《新唐书·列传·卷一百四十七》
乐工都是昆仑人，穿绛叠毛，用朝霞做蔽膝叫作衤戒肍。
乐工皆昆仑，衣绛氎，朝霞为蔽膝，谓之瀼裓襔。
Musicians are all from the Kunlun Mountain area, wearing red double-layered fur, and wearing something made of rosy clouds as knee pads called ‘Li Jie Xi’.