《北史·列传·卷三》
君则无逸于上，臣则履冰于下，如能这样，太平岂难实现？ 
君则亡逸于上，臣则履冰于下。若能如此，太平岂难致乎！ 
The ruler should not indulge himself, and the ministers should tread on thin ice. If it could be like this, how can it be difficult to achieve peace and stability?