《资治通鉴·宋纪·宋纪一》
刘宋司州刺史毛德祖，在虎牢城内挖掘地道，深达七丈，分为六道，直通魏军的包围圈外。同时又招募敢死勇士四百人，由参军范道基率领，从地道爬出去袭击敌人的后背，北魏军队不胜惊慌。
毛德祖于城内穴地入七丈，分为六道，出魏围外；募敢死之士四百人，使参军范道基等帅之，从穴中出，掩袭其后。
Mao Dezu, the Governor of Sizhou in Liu Song, dug a tunnel that was seven zhang deep and was divided into six passages that led directly outside the encirclement of the Wei troops. At the same time, he recruited four hundred daredevil soldiers led by Fan Daoji, who crawled out of the tunnel to attack the enemy's rear, which caused panic in the Northern Wei army.