《资治通鉴·魏纪·魏纪五》
以前陛下临幸洛阳，征发百姓修建营垒，有关部门命令营垒修成就放民工回家；结果营垒建成，又贪图百姓工力的便宜，不按时放还。
前车驾当幸洛阳，发民为营，有司命以营成而罢；既成，又利其功力，不以时遣。
Your Majesty previously visited Luoyang and drafted commoners to build fortresses. The relevant departments directed that civilian workers be allowed to return home once the fortresses were built. However, after the fortresses were built, officials covetously sought to benefit from the commoners’ labor and failed to release them on time.