《旧唐书·列传·卷一百四十》
在此之前，太宗命秘书监魏征撰写四部群书，准备收藏于皇室仓库时，另外添加了二十个人校对文字，一百人进行抄写。
先是，太宗命秘书监魏征写四部群书，将进内贮库，别置雠校二十人、书手一百人。
Before that, Emperor Taizong ordered Wei Zheng, the director of the Palace Library, to compile the four parts of the books and prepare to collect them in the imperial warehouse. He also added 20 people to proofread the text and 100 people to transcribe.