《资治通鉴·梁纪·梁纪十》
贺拔岳私下里对他哥哥贺拔胜说： 万俟奴是一个强敌，现在攻讨他若不能取胜，固然有罪，但如果打败了他，谗佞嫉妒之言也会产生。 
岳私谓其兄胜曰： 丑奴，勍敌也。今攻之不胜，固有罪；胜之，谗嫉将生。 
Heba privately told Heba, his brother: Wanshinu is a powerful enemy. Now it is a crime to blame him for not being able to defeat him, but if we do, he will be slandered and envied.