《礼记·祭义》
这种进献熟食之祭可以起到教民相爱的作用。对上有报神之祭，对下有报鬼之祭，从礼数上来讲可以说两头都照顾到了。
教民相爱，上下用情，礼之至也。
This kind of cooked food sacrifice can play a role in educating people to love each other. There is a sacrificial ceremony to reward the gods above, and a sacrificial ceremony to reward the ghosts below. In terms of etiquette, it can be said that both ends are taken care of.