《史记·十二本纪·高祖本纪》
于是沛公就在夜间率兵从另外一条道路返回，更换了旗帜，天亮时，把宛城包围了三层。
於是沛公乃夜引兵从他道还，更旗帜，黎明，围宛城三匝。
So King Huai of Chu led his army to return from another road during the night, changed the banners, and surrounded Wancheng in three layers by daybreak.