《元史·列传·卷六十三》
几天后阿合马奸党多数处死，又将刘正械到拱卫司，火鲁霍孙说 ：皇上曾说刘正是穿白衣，在炭穴中行走十年而身不污，可称得上廉洁。 
会日暮，车驾还内，俱械系于阙东隙地。逾数日，奸党多伏诛，复械系正于拱卫司，火鲁霍孙曰： 上尝谓刘正衣白衣行炭穴十年，可谓廉洁者。 
A few days later, most of the traitors in Ahema's party were executed. Liu Zheng was then taken to the Arch Guard Division. Huoluohusun said: "His Majesty once said that Liu Zheng wore white clothes and walked in the charcoal pit for ten years without getting dirty. He can be called honest."