《北史·列传·卷六十三》
文帝非常高兴，对群臣说： 朕今日看到了周公制定礼，见到了仲尼议论孝，实在大慰朕心。 
上大悦，谓群臣曰： 朕今睹周公之制礼，见宣尼之论孝，实慰朕心。 
Emperor Wen was very happy and said to the ministers: I saw the rituals set by the Duke of Zhou today, and I saw Zhongni discuss filial piety, which really comforted my heart.