Liji, "Qu Li Shang (Summary of the Rules of Propriety Part 1)", 69 quote: "行：前朱鳥而後玄武，左青龍而右白虎。" James Legge's translation: "On the march the (banner with the) Red Bird should be in front; that with the Dark Warrior behind; that with the Azure Dragon on the left; and that with the White Tiger on the right".
Zheng Xuan (annotator) & Kong Yingda (clarifier), Book of Rites: Annotated and Clarified, "Vol 3. Qu Li 1". Siku Quanshu version. p. 27 of 158. quote: "前南後北，左東右西。朱鳥、玄武、青龍、白虎，四方宿名也。"
Zuozhuan "Duke Zhao's 29th year - zhuan". quote:「夫物，物有其官，官修其方，朝夕思之。……故有五行之官，是謂五官，……木正曰句芒，火正曰祝融，金正曰蓐收，水正曰玄冥，土正曰后土。……少皞氏有四叔，曰重、曰該、曰修、曰熙，實能金、木及水。使重為句芒，該為蓐收，修及熙為玄冥，……此其三祀也。顓頊氏有子曰犁，為祝融；共工氏有子曰句龍，為后土，……」. Translation by Durrant, Li, & Schberg (2016) "Every kind of thing has its official, who is charged with perfecting the methods for it and keeping these in mind day and night. [...] Thus, there were the officials of the Five Resources(/ Agents / Phases), known as the Five Officials. [...] The Director for Wood was known as Goumang, the Director for Fire was known as Zhurong, the Director for Metal was known as Rushou, the Director for Water was known as Xuanming, and the Director for Earth was known as Houtu.[...] Shaohao had four younger brothers named Chong, Gai, Xiu, and Xi, who were talented with metal, wood, and water. He made Chong the Goumang, or Director for Wood; Gai the Rushou, or Director for Metal; and Xiu and Xi the Xuanming, or Director for Water.[...] Zhuanxu had a son named Li, who was the Zhurong, or Director for Fire. Gonggong had a son named Goulong, who was the Houtu, or Director for Earth. [...]"
