《史记·七十列传·范雎蔡泽列传》
办事不早作准备，就不能够应付突然的变化。如今武安君已经死了，而郑安平等人叛变了，国内没有能征善战的大将而国外敌对国家很多，我因此忧虑。 
夫物不素具，不可以应卒，今武安君既死，而郑安平等畔，内无良将而外多敌国，吾是以忧。 
Failure to plan ahead is not able to deal with sudden changes. Now that King Wuan is dead, Zheng Anping and others have rebelled, there are no capable generals at home, and there are many hostile foreign countries, so I am worried.