《史记·七十列传·孙子吴起列传》
他和母亲决别时，咬着自己的胳膊狠狠地说： 我吴起不做卿相，绝不再回卫国。 
与其母诀，齧臂而盟曰： 起不为卿相，不复入卫。 
When he said goodbye to his mother, he bit his arm and said fiercely, "If I, Wu Qi, do not become a prime minister, I will never return to Wei."