《史记·七十列传·范雎蔡泽列传》
当年伍子胥被装在口袋里逃出昭关，到了夜里才敢赶路，白天就隐藏起来，到了陵水后，没有可以用来充饥的食物，就用膝盖跪在地上匍匐着向前行走，裸露着上身对着别人磕头，鼓着肚子吹奏笛子，在吴国的集市上讨饭吃，但最终却能够令吴国兴盛，令吴王阖闾成了霸主。
伍子胥橐载而出昭关，夜行昼伏，至於陵水，无以餬其口，行蒲伏，稽首肉袒，鼓腹吹篪，乞食於吴市，卒兴吴国，阖闾为伯。
Back then, Wu Zixu was put in a pocket and escaped from Zhaoguan, and dared to drive at night, and hid during the day. After arriving in Lingshui, he had no food to satisfy his hunger, so he crawled forward on his knees and bowed to others with his upper body naked. Blowing the flute, begging for food in the market in Wu State, but in the end he was able to make Wu State prosper and make King Helu of Wu become the overlord.