Book of Documents
In the twenty-ninth year of his reign, he conducted rituals in honour of his ancestor King Tang, the first king of the Shang dynasty, at the Royal Temple. Angered by the presence of a wild chicken standing on one of the ceremonial bronze vessels, he condemned his vassals and wrote a proclamation called "Day of the Supplementary Sacrifice to Gao Zong" (, presently in the "Book of Documents" ). However, the Book of Documents passage in question is attributed to Zu Ji, who is evidently still alive.