《魏书·列传·卷四十三》
居虎门之左，司王朝，执掌国中过失的事情，以之教诲国臣子弟。 
居虎门之左，司王朝，掌国中之事，以教国子弟。 
Located on the left side of Humen, it governs the dynasty, controls the faults in the country, and uses it to teach the children of the subjects of the country.