《新唐书·列传·卷一百四十六》
后来，吐谷浑与吐蕃相攻，都上书来指责对方，并来请求援兵。皇帝两方都不答应。
既而与吐蕃相攻，上书相曲直，并来请师，天子两不许。
Later, Tugu Hun and Tubo fought against one another, and both submitted memorials accusing the other side of wrongdoing and asking for reinforcements. The emperor refused both of them.