《仪礼·士冠礼》
赞冠人在房中洗觯，独自斟醴，把小匙口朝下放在觯上，匙头朝前。
赞者洗于房中，侧酌醴；加柶，覆之，面叶。
The guanzhe washed the horn in the room, poured the spirits himself, and put the small spoon in the horn with the mouth of the spoon down and the head of the spoon forward.