《隋书·列传·卷二十二》
道衡在任州官时，为政清简，官吏、百姓都感激他的恩惠。炀帝继位后，道衡转任番州刺史。
尚想睿图，永惟圣则，道洽幽显，仁沾动植。
When Dao Heng was an official of Renzhou, his governance was simple and clear, and the officials and people were grateful for his kindnesses. After Emperor Yang ascended the throne, Dao Heng was reassigned as the prefect of Fan Prefecture.