淨名經集解關中疏 1.256

1.256

若在王子王子中尊示以忠孝　為臣須忠為子應孝。肇曰。所承處重。宜以忠孝為先也。

"When among princes, he was the most honored among princes, showing them loyalty and filial piety." A minister must be loyal, and a child should be filial. Sengzhao says: "The position they inherit is momentous; they should take loyalty and filial piety as primary."