《礼记·服问》
有的本应跟着穿较重的丧服而变为穿较轻的丧服，例如妻为其娘家父母服齐衰期，是重服；而丈夫为其岳父母仅服绍麻，是轻服。
有从有服而无服，公子为其妻之父母。 传曰： 母出，则为继母之党服；母死，则为其母之党服。
Some who should have worn heavier mourning clothes wore lighter ones. For example, the wife wore plain mourning clothes for her parents, which was heavy mourning clothes, but the husband only wore white cloth mourning clothes for his in-laws, which was light mourning clothes.