《陈书·列传·卷三十》
等到叔陵出奔到东府，派遣使者告诉他，伯固单人匹马赶去，协助叔陵指挥兵士。
及叔陵出奔东府，遣使告之，伯固单马驰赴，助叔陵指挥。
When Shu Ling fled to the East Palace, he sent a messenger to tell him that Bo Gu went there alone and assisted Shu Ling in commanding the soldiers.