《资治通鉴·汉纪·汉纪三十三》
到达亢父县，有人说官员们都很疲劳，可暂且停止行军，住宿休息。刘秀不同意，又行军十里路，在任城住宿，距离桃城六十里。
至亢父，或言百官疲倦，可且止宿；上不听，复行十里，宿任城，去桃城六十里。
When he reached Kangfu County, someone said that the officials were very tired and could stop marching for a while to rest. Liu Xiu disagreed, marched another ten miles, and lodged in Rencheng, sixty miles from Taicheng.