《新五代史·列传·杂传第二十七》
如今我们跨越千里攻伐别人，而强大的燕在后面，这是心腹之患。 
今吾越千里以伐人，而强燕在其后，此腹心之患也。 
"Now we have marched thousands of miles to attack others, while the powerful Yan is behind us. This is a hidden danger that we cannot afford to ignore."