《战国策·秦四·顷襄王二十年》
齐国南下攻取泗北之地，大王出兵击溃楚国，不料让他人坐收渔人之利，既扩张了韩、魏国土，又增强了齐国实力。
齐人南面，泗北必举。此皆平原四达，膏腴之地也，而王使之独攻。
Qi will march south to take Sibei. King will defeat Chu with his army, but the benefit will be reaped by others. Han and Wei will expand their territories while Qi will grow stronger.