《资治通鉴·后梁纪·后梁纪二》
吴越游弈都虞候司马福欲潜水前行入城，故意用竿触网；淮南兵听到铃声举起网来，司马福因此能够通过，一共在水中待了三天，才得进入城里。
吴越游弈都虞候司马福欲潜行入城，故以竿触网，敌闻铃声举网，福因得过，凡居水中三日，乃得入城。
Sima Fu, the patrolling officer of Wuyue, intended to dive into the city, so he poked the nets with a pole. The Huainan army lifted up the nets when they heard the bell sound. Sima Fu was thus able to pass through and remained underwater for three days before successfully entering the city.