The Book of Rites gave refined instruction, admonishing against the use of sacrificial objects not appropriate to the time or place (e.g., people from the mountains should not use fish, people from the sea should likewise avoid deer).
例如居高山的人用山上所不生長的魚鰲為祭品，或是住水濱的人用水濱所不生長的鹿或野豬為祭品，就不合宜。