《周礼·夏官司马·虎贲氏&道右》
负责奉王命前往吊唁或慰劳三公、孤、卿。王行燕饮酒礼，就协助王行礼。
王燕饮，则相其法。
Responsible for delivering Wang's orders to express condolences or comfort to the three dukes, the solitary, and the nobles. When wang performs the ritual of drinking wine and eating, they assist wang in performing the ritual.