《资治通鉴·隋纪·隋纪五》
己丑，规定民间铁叉、搭钩、刀之类都属于违禁之物。
己丑，制民间铁叉、搭钩、刃之类皆禁之。
On the day of ji chou (second day of the cycle), it was decreed that iron forks, hooks, knives, and other similar objects were all contraband among the common people.