《资治通鉴·秦纪·秦纪三》
二月，刘邦等攻打砀，历时三日，攻克了该城，收编了砀的降兵，得六千人，与以前的兵力汇合一处，达九千人。
二月，攻砀，三日，拔之。收砀兵得六千人，与故合九千人。
In February, Liu Bang attacked Dang for three days, captured the city, recruited the surrendered soldiers, and gained six thousand people. Together with the previous troops, the total number of troops reached nine thousand.