《魏书·列传·卷三十六》
 自古圣王，其为飨也，玄酒在堂而酒在下，所以崇本重原，降于滋味。
自古圣王，其为飨也，玄酒在堂而酒在下，所以崇本重原，降于滋味。
Since ancient times, when the kings have given banquets, the ritual cup of wine has been placed in the hall while the actual wine was lower down, thus showing reverence to the origin and emphasizing the source while deprecating the mere taste.