《资治通鉴·隋纪·隋纪七》
炀帝认为李渊与王仁恭不能抵御突厥的进犯，派使者来要将他们押往江都。
帝以渊与王仁恭不能御寇，遣使者执诣江都。
Emperor Yang believed that Li Yuan and Wang Rengong could not withstand the invasion of the Turks, so he sent an envoy to take them prisoner to Jiangdu.