《汉书·传·外戚传上》
然后，武帝封李夫人的哥哥李广利为贰师将军，海西侯，封李延年为协律都尉。
其后，上以夫人兄李广利为贰师将军，封海西侯，延年为协律都尉。
Then, Emperor Wu named Li's brother Li Guangli Lieutenant General of the Second Division, Marquis of Haixi, and Li Ynian Lieutenant of Coordination and Rhythm.