《晋书·志·第十三章》
然而根据《琴操》有《公莫渡河曲》，说明其歌由来已久，俗说成项伯，是不对的。
然案《琴操》有《公莫渡河曲》，然则其声所从来已久，俗云项伯，非也。
However, according to “Qin Cao” which had “Song of Gong Mo’s Crossing River”, which indicates that this song has been for a long time, and it’s wrong to say that it’s Xiang Bo.