《颜氏家训·兄弟篇》
妯娌之间特别容易产生纠纷。即使是亲姐妹成为妯娌，也不如她们住的距离远一点，这样她们长久分离，反而会因感叹霜露降临而互相思念，等待相会的日子。
娣姒者，多争之地也，使骨肉居之，亦不若各归四海，感霜露而相思，伫日月之相望也。
There are particularly many disputes among sisters-in-law. Even if they are sisters-in-law, they are not as good as they live far away, so that they will be separated for a long time, and they will miss each other because of the感叹霜露降临, waiting for the day of reunion.