《战国策·齐六·燕攻齐齐破》
有一次田单路过菑水，看见一位老者赤足渡河非常寒冷，不能再走路了，僵坐在岸边的沙土上。
过菑水，有老人涉菑而寒，出不能行，坐于沙中。
Once, when Tian Dan passed by Zishui, he saw an elderly man who was barefoot and fording the river in the cold. The man was unable to walk any further and was sitting on the sand on the riverbank.