《金史·列传·卷四十五》
二年三月，因为朝廷搜括民间的存粮，张行信害怕失去民心，便上书说 ：近日朝廷命令知大兴府的胥鼎根据方便的办法筹划军粮，胥鼎便奏请允许人们交粟米买官。
二年三月，以朝廷括粮恐失民心，上书言： 近日朝廷令知大兴府胥鼎便宜计画军食，鼎因奏许人纳粟买官。
In March of the second year, because the imperial court confiscated the people's food reserves, Zhang Xingxin was afraid of losing the people's hearts, so he wrote to the emperor: "Recently, the imperial court ordered胥鼎, the prefect of Daxing Mansion, to plan for military supplies in a convenient way, and胥鼎 asked for permission to allow people to buy official positions with millet."