《史记·七十列传·魏豹彭越列传》
汉王二年春天，汉王和魏王豹以及各路诸侯向东攻打楚国，彭越率领他的部队三万多人在外黄归附汉王。
汉王二年春，与魏王豹及诸侯东击楚，彭越将其兵三万馀人归汉於外黄。
In the spring of the second year of the Han Dynasty, King Han and King Wei Bao and the various feudal lords attacked Chu from the east, and Peng Yue led his troops of more than 30,000 in Waihuang to join with King Han.