《汉书·纪·高帝纪上》
单父县的吕公，和沛县令是好友，因躲避仇家，寄居县令寓所，后举家迁沛。
单父人吕公善沛令，辟仇，从之客，因家焉。
Lü Gong from Danpu County was a good friend of the magistrate of Pei County, who took refuge in the magistrate's residence to avoid his enemies, and later moved his family to Pei.