《后汉书·列传·郑范陈贾张列传》
他们二人年纪老了，对经学很有研究，而臣没有及时退休，现在与梁恭并立，深知吕羌有学问，又不能进，对二老深感惭愧，没脸面见世人。
二臣年并耆艾，经学深明，而臣不以时退，与恭并立，深知羌学，又不能达，惭负二老，无颜于世。
The two of them are old and have extensive knowledge of the classics. I have not retired in a timely manner and now stand alongside Liang Gong, but I am well aware of Lv Qiang's scholarship and that I cannot surpass him. I am ashamed to stand before these two elders and have no face to meet the world.