《汉书·志·五行志中之下》
记上说： 不该开花而开花，换大夫；不当结果而结果，换相国。 
记曰： 不当华而华，易大夫；不当实而实，易相室。 
The records state: If flowers bloom when they should not, the Grand Administrator should be replaced; if fruit bears when it should not, the Chancellor should be replaced.