《魏书·列传·卷三十三》
正值国家多难，不能尽忠报德，竟想乘别人不备，怀不善之心。
属国步多虞，不能竭忠报德，乃欲乘人间隙，有不臧之心。
At a time when the country is facing many difficulties, he can't be loyal and repay his kindness. Instead, he wants to take advantage of others' unpreparedness and harbor evil intentions.