《仪礼·乡射礼》
主人在阼阶上方两拜谢宾，宾则在西阶上方对主人答两拜，然后相揖各就席。
主人阼阶上再拜，宾西阶上答再拜，皆揖就席。
The host thanks the guest twice at the top of the threshold staircase, and the guest answers the host twice at the top of the west staircase, and then bows to each other and takes their seats.