《南齐书·志·卷九》
孔晁有言，说五帝辅佐天帝化育万物，所以有配祀的礼仪，就是祭上天。
孔晁云，言五帝佐天化育，故有从祀之礼，旅上帝是也。
Kong Chao said that the Five Emperors aided the Emperor of Heaven to cultivate all things, so there is a ritual for accompanying sacrifices, which is the sacrifice to heaven.