金光明經文句記 5.53

5.53

初、述成安身方法。羽儀者，《漢書．高紀》曰「紀信乘王車，黃屋左纛。」注云：以黃繒為蓋裹。纛，毛羽幢也，在乘輿車衡左方上注之。蔡邕曰：「氂牛尾為之，如斗，或在騑頭、或在衡。以纛是毛羽幢，為天子儀仗，故曰羽儀。」經「躬出」者，躬，親也。

First, confirming the method of securing one's own person. Regarding "feather regalia" (yuyi), the "Annals of Emperor Gaozu" in the Book of Han states: "Ji Xin rode in the imperial chariot, with a yellow canopy and a yak-tail banner mounted on the left." The commentary says: "Yellow silk was used to line the canopy. The banner (dao) is a pennant of animal hair and feathers, mounted upon the left side of the carriage's crossbar." Cai Yong says: "It is made of yak tail, shaped like a peck measure, placed either on the head of an outer horse or on the crossbar. Because the banner is a pennant of feathers and hair serving as imperial ceremonial insignia, it is called feather regalia." As for "personally coming forth" in the sūtra, gong means personally.