《左传·昭公·昭公八年》
现在虞的世代数字不满一百，将会继续在齐国保持下去，它的征兆已经有了。 
继守将在齐，其兆既存矣。 
Now the number of generations of Yu is less than one hundred, and it will continue in the Qi state, and the signs of this are already present.