《新唐书·列传·卷一百四十》
统叶护可汗此时正自恃其强，对下属少恩，众人甚怨，很多都叛离。
方负其强，不以恩结下，众怨，多叛去，其诸父莫贺咄杀之，帝欲赍玉帛焚祭其国，会乱，不果至。
Khan Tongyehu was arrogant at that time, and he treated his subordinates with little kindness, and many people were resentful and began to rebel.