《礼记·内则》
即使是受到主人宠爱的埠妾，她的衣服和饮食也不敢恃宠乱来，以至于超过身份高于她的女人。
虽婢妾，衣服饮食必后长者。
Even a concubine who is favored by the master does not dare to take advantage of her favor to dress and eat in a way that exceeds the status of women who are higher than her.