《国语·吴语·勾践灭吴夫差自杀》
第二天将在江上进行船战，到黄昏时，越王便命令左军衔枚，逆江上行五里待命；又命令右军衔枚，沿江下行五里待命。
明日将舟战于江，及昏，乃令左军衔枚溯江五里以须，亦令右军衔枚逾江五里以须。
On the second day, the two armies fought by boat on the river. At dusk, the King of Yue ordered the left army to keep quiet, go against the current for five li and stand by; and also ordered the right army to keep quiet, go along the current for five li and stand by.