《史记·十二本纪·高祖本纪》
沛县父兄们都叩头请求说： 沛县幸运地得到免除徭役，丰邑还没有获准免除，请陛下哀怜丰邑。 
沛父兄皆顿首曰： 沛幸得复，丰未复，唯陛下哀怜之。 
Fathers and fellows of Pei County all kowtowed and said: Pei County fortunately received exemption from corvee labor, Fengyi has not received exemption, please show sympathy to Fengyi.