《资治通鉴·梁纪·梁纪一》
十二月丙子，北魏诏令殿中郎陈郡人袁翻等人议定设立法规律令，彭城王元勰等人担任总监。
十二月，丙子，魏诏殿中郎陈郡袁翻等义定律令，彭城王勰等监之。
On Bingzi day in December, the Northern Wei dynasty ordered the Imperial Attendants Yuan Fan and others to discuss and draw up laws and decrees. King Yuanxie of Pengcheng and others were in charge of it.