《晋书·志·第二十章》
服三年以下刑罚的，用杖打自己来惩罚，还应该规定惩罚的数量，使之有一定的限度，不能少于这个限度。
其三岁刑以下，已自杖罚遣，又宜制其罚数，使有常限，不得减此。
For those who are sentenced to imprisonment below 3 years, they shall be punished by flogging himself, and the amount of punishment shall be regulated, with a definite limit, no less than the limit.