《礼记·郊特牲》
祭品既不敢用生人认为味美可口者，也不敢追求品种繁多，因为祭品是用来供奉神灵的。
宾入大门而奏《肆夏》，示易以敬也。
The sacrificial offerings are neither to be used by living people who think they are delicious nor to be of a wide variety, because the sacrificial offerings are used to pay homage to the gods.