《北史·列传·卷六十八》
尚书令、任城王元澄奏称，安定公应出入宫禁，参与商议大政。
尚书令、任城王澄奏，安定公宜出入禁中，参谘大务。
Minister Shangshu, King Yuancheng of Rencheng, said that Anding Gong should enter and leave the palace to participate in the discussion of major policies.