《汉书·志·食货志上》
冬天，人们已经回来了，妇人们同在一个屋子里，一起在夜晚织布，女工一个月早晚共有四十五个工作曰。
冬，民既入，妇人同巷，相从夜绩，女工一月得四十五日。
In winter, the people have returned, and the women are in the same house, weaving together in the evening. The total working hours for women workers are 45 days a month.