《资治通鉴·汉纪·汉纪三十九》
途经任城时，章帝临幸郑均家，赐给他尚书俸禄，享用终身。因平民穿白衣，所以当时人称郑均为 白衣尚书 。
行过任城，幸郑均舍，赐尚书禄以终其身，时人号为 白衣尚书 。
When Emperor Zhang passed Rencheng, he visited Zheng Jun at his home and granted him the imperial emolument of 尚书, which he was to enjoy for the rest of his life. Since commoners wore white, Zheng Jun was commonly known as “the White-clad Minister of Imperial Records” (白衣尚书).