《仪礼·乡饮酒礼》
主人取俎，转身授与弟子，弟子持俎从西阶下堂，主人则从阼阶下堂。
主人取俎，还授弟子；弟子以降自西阶，主人降自阼阶。
The host takes the plate, turns around, and gives it to the apprentice, who takes the plate and goes down from the west steps. The host goes down from the threshold steps.