《资治通鉴·隋纪·隋纪二》
隋文帝喜爱预卜吉凶灾祥的雕虫小技，上仪同三司萧吉上书说： 甲崐寅、乙卯之年，是天地阴阳之气相互交合的时候。
上好禨祥小数，上仪同三司萧吉上书曰： 甲寅，乙卯，天地之合也。
Emperor Wen of Sui was fond of the small skill of foretelling good and bad fortune. Xiao Ji, the Shangyi Secretary of the Three Departments, submitted a memorial saying: "Jia Kunyin and Yi Maovu are the years when the yin and yang of heaven and earth interact with each other.