《魏书·列传·卷五十六》
举国上下，怨声载道，那就预示着教化有亏损，百姓贫困那君主也无从取财。
国怨则示化有亏，民贫则君无所取。
If the entire country is filled with complaints, it signifies that education has failed, and if the people are poor the ruler has no source of wealth.