《资治通鉴·汉纪·汉纪四十二》
我听说，天子有赐封的权力，赐封给有功的人；诸侯有赏爵的权力，赏爵给有德的人。
臣闻天子专封，封有功；诸侯专爵，爵有德。
I heard that the emperor has the power to issue fiefdoms, issued to those with merit; the feudal lords have the power to award ranks, awarded according to virtue.