《周礼·天官冢宰·酒正&掌次》
凡六寝中的杂事，如扫除、天黑执掌火把、冬天供给炉炭，凡属脏累的活都负责干。
凡寝中之事，埽除、执烛、共炉炭，凡劳事。
All miscellaneous tasks in the six sleeping quarters, such as sweeping, holding torches at night, and supplying charcoal in winter, would be handled by the official, who would also be responsible for all dirty and tiring work.