《礼记·文王世子》
天子亲自检查肴撰酒醛，过问孝敬老人的各种美味是否齐备。当这一切就绪之后，于是奏乐迎接被养的贵宾。贵宾进门后先即位于西阶下，天子退酌醛酒敬献，行孝养老人之礼。
适馔省醴，养老之珍，具；遂发咏焉，退修之以孝养也。
The emperor personally checked the food and drinks, to check that all the delicacies for offering to the elderly were complete. When everything was ready, music was played to greet the honored guest who was being cared for. When the guest entered, he first stood at the bottom of the west steps, and the emperor came down to offer him wine in a toast, in order to show his respect for the elderly.