《资治通鉴·梁纪·梁纪十六》
西魏岐州长期经受战乱，刺史郑穆初到任时，只有三千户人家，郑穆安抚百姓，让他们休养生息，并让他们聚集而居，几年之间，岐州便有了四万多户人家，朝廷考绩时在所有州刺史中他的政绩最好；丞相宇文泰提拔郑穆为京兆尹。
魏岐州久经丧乱，刺史郑穆初到，有户三千，穆抚循安集，数年之间，至四万馀户，考绩为诸州之最；丞相泰擢穆为京兆尹。
Xi Wei's Qizhou had been suffering from the calamity of war for a long time. Zheng Mu, the governor of the prefecture, saw only 3,000 families when he first took office. Zheng Mu appeased the people, let them recuperate, and made them live together. In the space of a few years, Qizhou had over 40,000 families, and his achievements in governing were the best among all the governors of the prefecture when the court assessed their performance. Prime Minister Yuwen Tai promoted Zheng Mu to the position of Jingzhao Yin.