《宋书·志·卷十六》
而郊祀在开始时把酒洒在地上，同宗庙祭祀是一样的，而送神时又要把酒洒在地上，议论的人认为宗庙祭祀与郊祀仪式不相同，对这件事有疑问。
而郊初灌，同之于庙，送神又灌，议仪不同，于事有疑。
Now, at the suburban sacrifices, the libation was poured out at the commencement, as at the ancestral temple, and there was a repetition of the offering at the dismissal of the spirits; and by some it has been argued that the different treatment of the two sacrifices at this point points to some distinction in their essential principles.