釋氏稽古略 2.215

2.215

魏譯佛經師十九人。出經律論四百十九部凡一千九百餘卷。僧至二百萬。國家大寺四十七所。三公等寺八百四十所。百姓所造寺院三萬一千所（魏書又辯正錄）。柔然者夷狄國名。姓郁久間氏。始元魏神元之末。掠騎得一奴。髮始齊眉忘本姓名。其主字之曰木骨閭。木骨閭者首禿也。木骨閭與郁久間聲相近。得以為氏。木骨閭在代猗廬時坐後期當斬。亡匿廣漢谿谷間。有眾百餘人。至其子車鹿會雄健。始有部眾。自號柔然。魏太武帝燾。以其無知狀類於蟲故。改其號蠕蠕（北史）。

In the Wei, there were nineteen masters who translated Buddhist scriptures. They produced 419 works of sūtras, vinaya, and treatises, totaling more than 1,900 fascicles. The monastic assembly reached two million. There were forty-seven major state-sponsored monasteries, 840 monasteries founded by the Three Excellencies and other high officials, and thirty-one thousand monasteries and cloisters founded by commoners (from the History of the Northern Wei and the Record of Clarifying What Is Right). The Rouran was the name of a barbarian state, whose clan name was Yujiulü. At the end of the reign of Emperor Shenyuan of the Yuan-Wei, raiding cavalry captured a slave whose hair was just level with his eyebrows and who had forgotten his original family name. His master gave him the courtesy name Mugulü; 'Mugulü' means a bald head. As 'Mugulü' and 'Yujiulü' sound alike, it became the clan name. In the time of Yilu of Dai, Mugulü was sentenced to execution for arriving late; he fled and hid among the gorges of the Guanghan river valley, gathering more than a hundred followers. When his son Cheluhui grew valiant, he first formed a tribal multitude and called themselves the Rouran. Because their ignorance resembled that of crawling worms, Emperor Taiwu (Tao) of the Wei changed their name to Ruru (from the History of the Northern Dynasties).