《魏书·列传·卷十三》
返回，叹息说： 从前霍去病认为匈奴没消灭，要家做什么，现在强大的敌寇还在沙漠北面活动，我哪能安心坐在华美的房舍中呢? 
道生还，叹曰： 昔霍去病以匈奴未灭，无用家为，今强寇尚游魂漠北，吾岂可安坐华美也！ 
Returning, he sighed and said: In the past, Huo Qubing believed that the Huns had not been eliminated, so what should the family do? Now the powerful enemy is still active in the north of the desert. How can I sit in the gorgeous house with peace of mind?