《新唐书·列传·卷一百一十七》
颜杲卿瞪眼骂说： 你不过是营州放羊的羯奴而已，深受朝廷恩宠，天子哪点对不起你，为何要反叛？
杲卿瞋目骂曰： 汝营州牧羊羯奴耳，窃荷恩宠，天子负汝何事，而乃反乎？
Yan Gaoqing glared and cursed: “You’re just a sheep-herding slave from Yingzhou who was favored by the Emperor. How has the Son of Heaven wronged you that you would lead a rebellion?”