《周礼·天官冢宰·九嫔&女史》
女御负责安排依次到燕寝陪侍王过夜。按每年的一定季节呈献劳动成绩。
女御掌御叙于王之燕寝，以岁时献功事。
The concubines arranged for women to accompany the king overnight in turn. Every year, they would submit the results of their work according to the season.