《宋史·列传·卷三十一》
守边的主将大多妒忌他，有的人暗中向皇帝写诬告信指责他的缺点，皇帝见了都不追问，反把这些奏章封好交给杨业。
主将戍边者多忌之，有潜上谤书斥言其短，帝览之皆不问，封其奏以付业。
Most of the generals guarding the border were envious of him, and some even secretly sent the emperor anonymous letters accusing him of fault. The emperor did not bother to investigate any of them, but instead sealed these reports and delivered them to Yang Ye.