《南齐书·志·卷九》
另外《礼记》载 天子祭祀天地、四方、山川、五祀，在一年之中祭祀一遍 。
又《礼记》 天子祭天地、四方、山川、五祀，岁遍 。
In addition, the "Book of Rites" states that the emperor sacrifices to the heavens and earth, the four directions, the mountains and rivers, and the five sacrifices once a year.