《资治通鉴·隋纪·隋纪六》
樊子盖收缴了杨玄感的文件档案，得到韦福嗣起草的给樊子盖的信件，就封好呈送给炀帝。炀帝命令将韦福嗣押起来送到自己的行宫。
樊子盖收玄感文簿，得其书草，封以呈帝；帝命执送行在。
Fan Zigai collected Yang Xuan'gan's documents and archives, and got the letter to Fan Zigai drafted by Wei Fusi. He sealed the letter and presented it to Emperor Yang. Emperor Yang ordered that Wei Fusi be escorted to his palace.