《资治通鉴·周纪·周纪一》
主公不如先答应智瑶的要求，让他骄傲自大，然后我们可以选择盟友共同图谋，又何必单独以我们作智瑶的靶子呢！ 魏桓子说： 对。 
主不如与之以骄智伯，然后可以择交而图智氏矣。奈何独以吾为智氏质乎！ 桓子曰： 善。 
"Master, why don't you first agree to Zhiyao's request, let him become proud and arrogant, and then we can choose an ally to plot together? Why do we have to be Zhiyao's target alone?" Wei Huanzi said, "Yes."