《资治通鉴·汉纪·汉纪一》
楚军来了许多骑兵，汉王于是就在军中挑选可以担当骑兵将领的人，大家都推举过去秦军的骑士重泉人李必、骆甲出任，汉王便打算授任他俩。
楚骑来众，汉王择军中可为骑将者，皆推故奉骑士重泉人李必、骆甲。
As the Chu forces had many cavalrymen, King Han thus selected those in his army who could serve as cavalry commanders. Everyone recommended Li Bi and Luo Jia, who had been cavalrymen in the former Qin army, and King Han intended to appoint them.