《后汉书·列传·光武十王列传》
下诏书道： 《礼记》说 伯父归宁乃国 ，《诗经》说 叔父建尔元子 ，这是恭敬至极了。
下诏曰： 《礼》云伯父归宁乃国，《诗》云叔父建尔元子，敬之至也。
The imperial edict read: "The Book of Rites" says, "When an uncle's father returns home, it is as if the country returns." The "Book of Songs" says, "Your uncle's parents have given you a son." This is the ultimate in respect.